There is treasure to be desired and oil in the dwelling of the wise; but a foolish man spends it up.
All Commentaries on Proverbs 21:20 Go To Proverbs 21
Augustine of Hippo
AD 430
Another passage of Scripture speaks of the precious treasure of wisdom and describes ruminating on wisdom as clean and not ruminating as unclean: “A precious treasure rests in the mouth of a wise man; but a foolish man swallows it up.” Symbols of this kind, either in words or in things, give useful and pleasant exercise to intelligent minds in the way of inquiry and comparison. But formerly people were required not only to hear [of food laws] but to practice many such things. For at that time it was necessary that, by deeds as well as by words, those things should be foreshadowed which were in after times to be revealed. After the revelation by Christ and in Christ, the community of believers is not burdened with the practice of the observances but is admonished to give heed to the prophecy. This is our reason for accounting no animals unclean, in accordance with the saying of the Lord and of the apostle, while we are not opposed to the Old Testament, where some animals are pronounced unclean.
