A bishop was testing the suitability of a group of candidates for baptism.

"By what sign will others know that you are Catholics?" he asked.

There was no reply. Evidently no one had expected this question.

The bishop repeated the question. Then he said it once again, this time making the sign of the cross to give the others a clue to the right answer.

Suddenly one of the candidates got it. "Love" he said.

The bishop was taken aback. He was about to say "Wrong," then checked himself in the nick of time.