Doth not even nature itself teach you, that, if a man have long hair, it is a shame unto him?
The fact that "nature" has provided woman, and not man, with long hair, proves that man was designed to be uncovered, and woman covered. The Nazarite wore long hair lawfully, as part of a vow sanctioned by God (Numbers 6:5: cf. 2 Samuel 14:26, and Acts 18:18). "Nature" is God's will impressed on creation; when He is recognized, Nature's teachings are auxiliary to Revelation.