An example of what I mean comes from a video clip I recently watched pitting Oprah against an audience of protestants. At one point one of the audience made a statement that drew applause from the rest and the beaming in her eyes couldn't hide the self-important pride she felt.
In my view, if I put myself in Oprah's shoes I would most definitely be turned off by that "Christian" person. As a moderator of the A&T forum I often encounter what appears to be a similar attitude between opponents of discussions.
In my opinion there is no place for that attitude in Christian witnessing. In fact, I believe we are called to just the opposite.
For I say, through the grace given to me, to everyone who is among you, not to think of himself more highly than he ought to think, but to think soberly, as God has dealt to each one a measure of faith. Romans 12:3 NKJV