'Teaches' in the Bible

Which things also we speak, not in words which man's wisdom teaches, but which the Holy Spirit teaches, comparing spiritual things with spiritual things.

Every man who prays or prophesies with something on his head dishonors his head [and the One who is his head].

And every woman who prays or prophesies when she has her head uncovered disgraces her head; for she is one and the same as the woman whose head is shaved [in disgrace].

Nature itself teaches you neither that it is disgraceful for a man to have long hair