16. The principle of the philosophers and stoics is different, dearest brother, who say that all sins are equal, and that a grave man ought not easily to be moved. But there is a wide difference between Christians and philosophers. And when the apostle says, “Beware, lest any man spoil you through philosophy and vain deceit,” we are to avoid those things which do not come from God’s clemency, but are begotten of the presumption of a too rigid philosophy. Concerning Moses, moreover, we find it said in the Scriptures, “Now the man Moses was very meek;” and the Lord in His Gospel says, “Be ye merciful, as your Father also had mercy upon you;” and again, “They that be whole need not a physician, but they that are sick.” What medical skill can he exercise who says, “I cure the sound only, who have no need of a physician?” We ought to give our assistance, our healing art, to those who are wounded; neither let us think them dead, but rather let us regard them as lying half alive, whom we see to have been wounded in the fatal persecution, and who, if they had been altogether dead, would never from the same men become afterwards both confessors and martyrs.