Origen

“ For certainly in writing against Christians, the very essence of whose faith is God, and the promises made by Christ to the righteous, and His warnings of punishment awaiting the wicked, he must see that, if a Christian were brought to renounce Christianity by his arguments against it, it is beyond doubt that, along with his Christian faith, he would cast off the very doctrine from which he says that no Christian and no man should ever swerve. ”

“ And he adds, “Thus, supposing that pleasure were the highest good, or that he was of that opinion whose mind was under the dominion of passion, we should not the less give him help, and show that, even on the principle that pleasure is the highest and final good of man, all passion is disallowed.” And Celsus, in like manner, after having embraced the doctrine, “that the righteous shall be blessed, and the wicked shall suffer eternal punishments,” should have followed out his subject ”

“ For when he sought to apply remedies to the affections and passions which oppress and distract the human spirit, after employing such arguments as seemed to himself to be strong, he did not shrink from using in the second and third place others which he did not himself approve of. “For,” says he, “if it were held by any one that there are three kinds of good, we must seek to regulate the passions in accordance with that supposition ”