Thomas Aquinas

Then when he says, Neither, he assigns the reason for what he had said. To understand this it should be noted that the order of the perfect and of the imperfect is such that in one and the same subject the imperfect precedes the perfect in the order of time. For one is a boy, before he is a man. Absolutely speaking, however, the perfect precedes the imperfect in the order of time and of nature. For a boy is produced from the man. …

Commentary on 1 Corinthians ↗