It is an article of faith among those who sell for a living that it is imperative to have a "15 second elevator speech" ready to fly out of your mouth when asked "What do you do?"
Sales-of-a-lifetime have been made on such random, chance encounters. And yes, some of them have been on elevator rides between two adjacent floors.
My gut feel is that many of my readers are devoutly religious. Can you condense the most compelling reason(s) for why YOU follow your faith in fifteen-seconds or less? The implicit challenge is to not bury the "What is in it for me" too deeply.
Mine is still in the wet-cement stage. It goes something like this:
I am a Christian because I believe the world is filled with people who seek to deceive me for power, profit and entertainment.
The Bible is the Owner's Manual for humans. It provides objective truths that armor me against the deceivers.
It shows me how to fulfill my mission as one created in the image-and-likeness of God.