Clement of Alexandria

Philosophers, then, are children, unless they have been made men by Christ. "For if the son of the bond woman shall not be heir with the son of the free," at least he is the seed of Abraham, though not of promise, receiving what belongs to him by free gift. "But strong meat belongeth to those that are of full age, even those who by reason of use have their senses exercised to discern both good and evil." "For every one that useth milk is unskilful in the word of righteousness; for he is a babe," and not yet acquainted with the word, according to which he has believed and works, and not able to give a reason in himself. "Prove all things," the apostle says, "and hold fast that which is good," speaking to spiritual men, who judge what is said according to truth, whether it seems or truly holds by the truth.