Theophylact of Bulgaria
Verses 36b-37. Notice how at first he admires the one who keeps his virgin. He calls him firm, steadfast, and acting with discernment in his own matter, for he says: "being steadfast in heart." Therefore he who gives his virgin in marriage is not steadfast. By the words "being under no necessity," he shows that the father has authority to give his daughter a husband, and no one can compel him not to give her in marriage. Therefore honor belongs to him if he leaves his daughter unmarried. For this reason the apostle praises him, saying that he does well.