As future priests, we are going to be given rigorous, hands-on jobs to teach people righteousness and holiness, distinguishing between the sacred and profane.
Clothing and hair length signal and reflect areas of rebellion, defiled attitudes, and spiritual health, providing a barometer of a person's character.
Should women wear hats to church? What is the correct hair length for men and women? Paul teaches on these subjects in I Corinthians 11.