Colorado Governor Bill Ritter invoked a passage of Micah as an example of how faith intersects with politics.
"Politics is about us as spiritual beings understand that there is a God, that this is a created world," he said. "In Micah, it says love justice, be merciful and walk humbly with our God."
Democratic Party Chairman Howard Dean and House Majority Whip James Clyburn (D-S.C.) sat in the front row.
The theater seating 5,000 inside the convention center was not packed, but an impressive number attended the first official event.
"This is just the beginning for us as people of faith," DNC CEO Leah Daughtry said. There will be caucuses for people of faith later in the week.