Origen

“ And if they are not to be blamed for so doing, let us see whether Christians do not exhort multitudes to the practice of virtue in a greater and better degree than they. For the philosophers who converse in public do not pick and choose their hearers, but he who likes stands and listens. ”

“ And this is their method of procedure, both with those who are sinners, and especially with those who lead dissolute lives, whom they exclude from their community, although, according to Celsus, they resemble those who in the market-places perform the most shameful tricks. ”