The title was taken from a recent post on one of my favorite musician's blog. Andrew Schwab is a musician/singer/songwriter. In this piece he clearly articulates the importance of living a genuine faith without an agenda:
"We aren’t commanded to make a shallow pitch, a clever presentation, or a witty speech. Nor are we meant to be proud bearers of “bumper-sticker christianity,” complete with tactless t-shirts, tracts, and tokens which advertise spiritual slogans. God doesn’t want telemarketers. Why?"
Go to his post to find how he answers the question.
Here's a picture of Schwab from one of his shows years ago.