I ran across one quote that sorta floored me. It's a high Roman official talking to his nephew about whether or not a family they know are Christians because the nephew saw one of them drawing a fish in the dirt.

"Therefore she is a Christian," repeated Chilo.
"This signifies," said Petronius, "that Pomponia and Lygia poison wells, murder children caught on the street, and give themselves up to dissoluteness! Folly! Thou, Vinicius, wert at their house for a time, I was there a little while; but I know Pomponia and Aulus enough, I know even Lygia enough, to say monstrous and foolish! If a fish is the symbol of the Christians, which it is difficult really to deny, and if those women are Christians, then, by Proserpina! evidently Christians are not what we hold them to be."

Basically, the common belief about Christians in Rome at that time was that Christians murdered children, poisoned wells and were generally enemies of the state. But the family they're referring to were such paragons of virtue and kindness that it caused these two Romans to reconsider what they'd always thought to be true.

I can just imagine that conversation today.

"Therefore she is a Christian," repeated Paul.
"No way! That would mean that Joe and Sally are intolerant, hateful, close-minded bigots who only want to turn our country into a theocracy and beat the fun out of every situation. You spent time in their house, as did I, and I say that if they are Christians, then Christians are different then we've always thought."

What a testimony that would be!