Light of the World

Scientists at UC Berkeley have developed a groundbreaking technology called Oz that uses laser light to make people see a completely new color — a dazzling, ultra-saturated blue-green they named olo. This new hue is unlike anything found in nature.

“Olo” was described as “a profoundly saturated teal … the most saturated natural color was just pale by comparison,” said Austin Roorda, one of Oz’s creators. The platform works by firing precise, tiny bursts of laser light at up to 1,000 light-sensitive cells — called photoreceptors — in the eye at once. With this control, researchers can make people see shapes, moving images, and especially colors that aren't normally visible.

The name Oz is a nod to The Wizard of Oz — a journey to an unknown land with sights never seen before. “We chose Oz to be the name because it was like we were going on a journey to the land of Oz to see this brilliant color that we’d never seen before,” said James Carl Fong, a doctoral student who helped develop the system.

Typically, humans see color using three kinds of cone cells in the retina: one each for blue, green, and red. But because green and red cones respond to very similar light, it's impossible in nature to trigger just the green ones alone. Oz overcomes this by activating only the green cones with laser light, letting people see what might be the “greenest green” ever — olo.

In experiments, people described olo as peacock green or blue-green, and far more intense than even a laser pointer’s green. “When I pinned olo up against other monochromatic light, I really had that ‘wow’ experience,” said Roorda.

Beyond just making people see new colors, Oz could help study vision loss and even explore whether we can expand how humans perceive color. As Roorda puts it: “I think that the human brain is this really remarkable organ that does a great job of making sense of inputs, existing or even new.”

Possible Preaching Angle:

God’s light also reveals spiritual truths beyond our innate understanding

In his novel, This Is Happiness, Niall Williams’ elderly narrator, Noe (pronounced No), remembers when electricity and light came to their little Irish village of Faha:

I’m aware here that it may be hard to imagine the enormity of this moment, the threshold that once crossed would leave behind a world that had endured for centuries, and that this moment was only sixty years ago.

Consider this: when the electricity did finally come, it was discovered that the 100-watt bulb was too bright for Faha. The instant garishness was too shocking. Dust and cobwebs were discovered to have been thickening on every surface since the sixteenth century. Reality was appalling. It turned out Siney Dunne’s fine head of hair was a wig, not even close in color to the scruff of his neck, and Marian McGlynn’s healthy allure was in fact a caked make-up the color of red turf ash.

In the week following the switch-on, (store owner) Tom Clohessy couldn’t keep mirrors in stock, as people came in from out the country and bought looking glasses of all variety, went home, and in merciless illumination endured the chastening of all flesh when they saw what they looked like for the first time.

Possible Preaching Angle:

Such is the illumination of the gospel—in a person’s heart, in a community, even in a culture. It’s no surprise, then, that John 3:19 says, “Light has come into the world, but people loved darkness instead of light because their deeds were evil.” James 1:23-24 warns against the folly of looking in the mirror of God’s Word only to walk away without changing.

Darkness captivates, baffles, and appalls us. It's a shifty thing of many textures, many moods, a state of fascination and of horror, an absence and a presence, solace and threat, a beginning and an end.

If you have ever been down a mine and been told by a guide to switch off your lamp you may feel like you have experienced it. But quantum physics has found that you are in fact surrounded by light you cannot see, for true darkness “does not exist.” Light particles—photons—exist throughout the known universe and beyond it.

Possible Preaching Angle:

Darkness is no impediment to our all-seeing God (Heb. 4:13). The One who created light (Gen. 1:3), sees all things (Prov. 15:3), nothing can conceal us from God, not even the deepest cave. Psalm 139:11-12 “… If I say, ‘Surely the darkness will hide me, and the light become night around me’—even the darkness is not dark to You, but the night shines like the day, for darkness is as light to You.”

Astronomers have found the brightest known object in the universe—a glowing core of a galaxy, called a quasar, located 12 billion light-years away. Quasars are the brightest objects in the cosmos, each consisting of a supermassive black hole that’s actively devouring an orbiting disc of gas and dust. But the black hole in this record-setting quasar is gobbling up more than a sun’s-worth of mass every day, making it the fastest growing black hole scientists have ever seen.

The gargantuan object stretches about seven light-years across, and it puts our sun’s luminosity to shame—the quasar shines more than 500 trillion times brighter than the star in our solar system.

Christian Wolf, lead author of the new study, said, “This quasar is the most violent place that we know in the universe. It is a surprise that it has remained unknown until today, when we already know about a million less impressive quasars. It has literally been staring us in the face until now.”

The black hole in the quasar is ravenous, consuming an amount of material equivalent to as much as 413 suns each year, and its black hole weighs about the same as 17 billion suns.

Wolf said, “It looks like a gigantic and magnetic storm cell with temperatures of 10,000 degrees Celsius, lightning everywhere and winds blowing so fast they would go around Earth in a second. He told reports that he doesn’t think anything will ever top this record for the universe’s brightest object.

Possible Preaching Angle:

This newly identified object is 500 trillion times brighter than our sun! How can anything be that bright? Thinking about this star gives us a sense of what the glorious presence of God is like, for Scripture says that God is a being who "lives in unapproachable light, whom no one has seen or can see."

Not only are the images from the James Webb Space Telescope brilliant and beautiful, but they are also baffling. Approximately 40 pairs of a new classification of orb have been identified within pictures of the Orion Nebula.

Dubbed JuMBOs—Jupiter Mass Binary Objects—these objects defy our current, conventional understanding of how planets, stars, and gravitational orbits work. Unlike normal planets, the Jupiter-sized pairs don’t orbit a star. Astronomers don’t know why—or how—they function in this way. As The New York Times put it, they are “a complete mystery.”

These images and discoveries coming back from the far reaches of space put us in our place. They bring to the forefront how expansive the universe is, how small we are, how much we don’t know, and how much there is yet to discover. When we consider the heavens—the star clusters, nebulae, black holes, and now JuMBOs—who are we? What is humankind that God is mindful of us and cares for us, as Psalm 8:3–4 says?

In “God’s Promises Are Clearest When We Turn Out the Lights,” Cort Gatliff reflects that “the stars provide perspective. They humble us by highlighting our finitude. Yet they also lift up our heads by reminding us of our infinite worth in the eyes of the Creator.” And while stunning images from space let us glimpse celestial realities we’d never be able to see with the naked eye, simple nighttime starscapes also invite us into awe and wonder.

During Advent, we often read this prophecy from Isaiah: “The people walking in darkness have seen a great light; on those living in the land of deep darkness a light has dawned” (9:2). In a spiritual and emotional sense, the recent heaviness of war, natural disasters, and other global tragedies helps us understand even more deeply what it means to be people walking in darkness. And this deep darkness only magnifies what it is to gaze upon the Light of the World. Amid it all, God is mindful of us. God does care for us. The Light of the World shines in the darkness.

The Starbucks at the CIA headquarters is not allowed to take names for orders. It’s not “business as usual” for the Starbucks franchise housed inside the CIA headquarters in Langley, VA. This particular store, code-named “Store Number 1,” operates much differently than their other 12,000+ stores in the U.S.—not surprising when it must accommodate clandestine spymasters working for the most powerful spy organization in the world.

This seller of skinny lattes and double cappuccinos is deep inside the agency’s forested Langley, Va., compound. Because the campus is a highly secured island, few people leave for coffee, and the lines can stretch down the hallway. Welcome to the “Stealthy Starbucks,” as a few officers affectionately call it.

Servers do not ask for the customer’s name (which they normally write on the coffee cup to expedite things), for undercover agents grow uncomfortable when someone asks for it. Even the receipts the baristas hand back have “Store Number 1” cryptically printed on them.

Each barista goes through a robust interview and background check before they are even told that they will be working at the CIA Starbucks. There are nine baristas working there and whenever they leave their work area, a CIA “minder” escorts them. All are regularly briefed about security risks and must report if someone seems overly interested in where they work or asks too many questions about their employment. They can’t even blow their own horns about working inside the CIA at nightclubs or parties and, if asked, can only tell friends, family members and acquaintances that they “work in a federal building.”

One barista said she has come to recognize people’s faces and their drinks. “There’s caramel-macchiato guy” and “the iced white mocha woman,” she said. “But I have no idea what they do. I just know they need coffee, a lot of it.”

Possible Preaching Angles:

1) Compromise; Hiddenness; Light of the World - Agents and even baristas must remain secretive and anonymous at CIA headquarters. But there should be no “undercover Christians” who follow this pattern in their daily lives. Christ wants no hidden Christians; he wants us to shine as lights and be bold and open in our testimony as his followers. 2) Accountability; Secrets; Secrecy – Christians must be open and accountable with one another; there should be no hidden areas of our lives that we conceal while pretending to be godly. 3) Persecution – Some are covert Christians who practice Christianity in secret, often because they fear persecution or discrimination because they live in countries where Christianity is illegal or heavily restricted.

When Krish Kandiah was young, growing up in the United Kingdom, his family could always count on their next-door neighbor, Mrs. Oglive, to be around. They left a spare key with her in case they got locked out, because she was always there—morning, afternoon, and night—to let them in.

Mrs. Oglive never went out. She suffered from agoraphobia, the fear of open spaces. Having lived next door to her for 40 years now, they still haven’t seen her venture past her doorway. She wasn’t always this way. She has pictures on her mantelpiece of less anxious days, from her honeymoon with Mr. Oglive and from a day at the beach with her children. But after her husband died, Mrs. Oglive began to isolate herself.

One can only imagine the heavy cloud of fear and frustration that surrounds her. Now frail and in the twilight of life, Mrs. Oglive’s curtains are almost always drawn.

There are some parallels between Mrs. Oglive and the contemporary church. Many Christians observe the world from behind closed curtains, bemoaning culture instead of engaging it. Many local churches are isolated from the wider community and world, bunkered up like doomsayers, suffering from fear of an open public square with divergent viewpoints and lifestyles.

Possible Preaching Angle:

Only by encountering the risen Christ and receiving the life-giving power of the Holy Spirit are we able to step beyond our doors and carry out God’s mission. When we do so, we are transformed from an agoraphobic church to an apostolic church.

At some point in the stretch of days between the start of the pandemic’s third year and the feared launch of World War III, a new phrase entered the zeitgeist, a mysterious harbinger of an age to come: people are going “goblin mode.”

The term embraces the comforts of (laziness): spending the day in bed watching [the TV] on mute while scrolling endlessly through social media, pouring the end of a bag of chips in your mouth; downing Eggo waffles over the sink because you can’t be bothered to put them on a plate. Leaving the house in your pajamas and socks only to get a single Diet Coke from the bodega.

“Goblin mode” first appeared on Twitter as early as 2009, but according to Google Trends “goblin mode” started to rise in popularity in early February 2022. “Goblin mode is kind of the opposite of trying to better yourself,” says Juniper, who declined to share her last name. “I think that’s the kind of energy that we’re giving going into 2022 – everyone’s just kind of wild and insane right now.”

But as the pandemic wears on endlessly, and the chaos of current events worsens, people feel cheated by the system and have rejected such goals. On TikTok, #goblinmode is rising in popularity. “I love barely holding on to my sanity and making awful selfish choices and participating in unhealthy habits and coping mechanisms,” said another with 325,000 views.

Many people tweeting about goblin mode have characterized it as an almost spiritual-level embrace of our most debased tendencies. Call it a vibe shift or a logical progression into nihilism after years of pandemic induced disappointment, but goblin mode is here to stay. And why shouldn’t it? Who were we trying to impress, anyway?

Possible Preaching Angle:

The world seems to be unraveling as people give themselves over to apathy, selfishness, and hopelessness. Let’s remember “the hope we have” (1 Pet. 3:15) and “shine as lights in a dark world” (Phil. 2:15) and keep up self-discipline and godly behavior while we wait for the Lord’s return (Phil. 3:20).

One of the most iconic attractions when visiting New York City is Times Square. Times Square stretches out over five blocks along Broadway and then spreads out several blocks covering the entire theater district. What draws tourists to the area is not only the world-class theaters but the city lights.

Times Square is lit up by arguably the largest concentration of electronic billboards on the planet. According to Con Edison, the Theater District estimated that peak consumption is around 161 megawatts at one time. To put that into perspective, that is enough energy to power 161,000 homes. That is twice the amount of electricity used in all the Casinos in Las Vegas! That's a lot of power!

Possible Preaching Angle:

In the Sermon on the Mount, Jesus calls his disciples to be salt and light; and collectively become that visible City on a Hill. When we connect to “his power" and gather as "his people" light will break through the darkness.

Looking at our planet from space, astronauts and satellites tell a story of startling expansion and changes. It is the story of human progress told from a unique perspective. The greatest change can only be seen at night. Vast cities sprawl out in a web of lights. Astronaut Don Pettit explains in a Smithsonian documentary, “From the first time I flew to the last time, the main effect I saw on Earth was at night time, and it was the extent of lighting.”

Astronauts love taking pictures of cites at night. But there’s one city that stands out, not because of its size, color, or shape, but it’s brightness. Pettit says. “I like to refer to Las Vegas, tongue and cheek, as the beacon of humanity ... I don’t know if it’s the brightest city on earth but it is really, really bright.”

With billions of LED lights, and countless billboards and marquees, Vegas generates more light per square mile than any other city on the planet. At the southern end of the Las Vegas Strip, a beam of light is projected up into the night sky from the Luxor resort pyramid. Curved mirrors are positioned to collect light from 39 xenon lamps creating a single intense, narrow beam. This one light produces 42 billion candle watts of power. The beam is visible by planes flying over Los Angeles, 275 miles away. It is an unmissable beacon from the heart of the Mojave desert.

Possible Preaching Angle:

It is sad but true that the identifying marks of our modern culture are often its cravings and excesses packaged in bright artificial light. In contrast, Christ, Christians, and churches are the true lights in a very dark world.

In his documentary titled Light On Earth, David Attenborough tells of an unbelievable experience of the S.S. Lima. On January 25, 1995, as this British Merchant vessel sailed the waters of the northwestern Indian Ocean, the seas beneath them began to glow.

On a clear moonless night, while 150 miles east of the Somalian coast, a whitish glow was observed on the horizon. And after fifteen minutes of steaming the ship was completely surrounded by a sea of milky white color with a fairly uniform luminescence. It appeared as though the ship was sailing over a field of snow or gliding over the clouds.

While stories of glowing seas have been a part of maritime folklore since the 1700’s, they have never been scientifically confirmed. But a group of scientists had an ingenious idea. Using a Defense Meteorological Satellite, Dr. Stephen Haddack and his team discovered a large luminescent area. Roughly the size of Connecticut (110 miles long), the phenomenon was identified in the exact area where the captain had reported his ship that night. Marine biologists discovered that the glowing sea was caused by massive swarms of bioluminescent bacteria feeding on large populations of algae.

Imagine that for a moment. Bacteria are microscopic. But when they congregate together, these tiny creatures, that cannot even be seen by the naked eye, can suddenly radiate their light 600 miles into orbit.

Possible Preaching Angle:

There is no place our light cannot reach if together we will let it shine before a searching humanity.

When Rev. Heber Brown III started noticing a particular need trending in his church, he did what pastors do – he found a way to spearhead a solution. Jesus said that man shall not live by bread alone; now, neither do the people under Brown’s care.

That’s because his church, Pleasant Hope Baptist, planted a community garden in order to provide the people in their community with fresh produce. Since food deserts, obesity, and diabetes plague many parts of Baltimore, the garden is meeting a critical need in the community.

Not content to keep all the goodness, Brown considered what might happen if he could find other local and regional partners. “We saw attendance bump up in our worship, we saw a great energy … and it went so [well] here, that I wondered what would happen if we could spread it through other churches and create a network of churches that do the same thing.”

Spreading it around meant not only partnering with local farmers and starting a pop-up farmers’ market after church, but partnering with other churches in neighboring Baltimore, Washington D.C., Virginia, and North Carolina in an initiative known as the The Black Church Food Security Network.

“If you come in with the mentality that I cannot be fully free until everybody is fully free, it makes for better partners,” said Rev. Brown, in a local radio interview. “And if we are strategic in being courageous subversives for each other, then I think the world that our children will inherit will be better than the one that we’re in right now.”

Potential Preaching Angles:

God cares about all of our needs, and Jesus often paired spiritual renewal with the meeting of physical needs. So if we’re going to be like Jesus, it might mean helping people get enough healthy food to eat.