One of the things I used to teach my clients when I was in investment banking is that one of the best ways of promoting your business to a potential investor or client is to tell the story! I used to have my clients practice their ‘elevator story’, which was a way of getting to the point of the story in the amount of time you would have to talk with someone on an elevator.
Similarly, one of the best ways to reach a neighbor, friend or co-worker for Christ is your personal testimony. You personal testimony is a story; it is not theology but simply how your human condition was changed when you accepted Jesus Christ as your Savior.
"I thank Christ Jesus our Lord, who has given me strength to do his work. He considered me trustworthy and appointed me to serve him,13 even though I used to blaspheme the name of Christ. In my insolence, I persecuted his people. But God had mercy on me because I did it in ignorance and unbelief. Oh, how generous and gracious our Lord was! He filled me with the faith and love that come from Christ Jesus. This is a trustworthy saying, and everyone should accept it: “Christ Jesus came into the world to save sinners”—and I am the worst of them all. But God had mercy on me so that Christ Jesus could use me as a prime example of his great patience with even the worst sinners. Then others will realize that they, too, can believe in him and receive eternal life."