Evangelicals are supposed to be the Christians most enthusiastic about sharing their faith. But most of us are as hesitant as a shy mainliner.

In the tradition of Rebecca Manley Pippert (Out of the Salt Shaker and into the World), Elisa Morgan wants to demystify this business: "We make the whole share-your-faith thing much more difficult than God makes it." And she puts a worn metaphor to good use: "Even a tiny speck of light changes the very nature of darkness."

Morgan addresses frankly and empathetically the reasons we hesitate (i.e., she admits up front she's been a mediocre evangelist at best), from "I might fail" to "I don't want to offend." Then she focuses on simple ways we can bring a "tiny speck of light" into our worlds: "Be real," "accept the doubt in others," and "leave room for wonder," among others. Nothing revolutionary here—but her stories are both honest and engaging.

Morgan does something surprisingly well for a president and CEO (MOPS International, a ministry to mothers of preschoolers): She writes in winsome prose. The title, unfortunately, suggests a sentimentality that is not characteristic of the book, which is a simple encouragement to share the hope within.

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Twinkle is available from Christianbook.com and other book retailers.

More information is available from Baker Books.

Elisa Morgan's radio show, MomSense, is available from the MOPS website.