Christ-followers can instruct their unsaved friends about the existence of God in various ways. One way is to point out the intricacies and beauty of nature and ask his or her friend to consider how all of nature could be produced without intelligent design. Or we could ask our friends how an innate sense of right and wrong is built inside us. The most effective way to tell a person about God is to use our own faith story. People gravitate to the real thing. It is much more interesting to hear how a life is changed by that intelligent designer.