Albert Barnes on Ephesians 5:28

So ought men to love their wives as their own bodies. Because they are one flesh, Eph 5:31. This is the subject on which Paul had been speaking, and from which he had been diverted by the allusion to the glorified church. The doctrine here is, that a husband should have the same care for the comfort of his wife which he has. for himself. He should regard her as one with himself; and as he protects his own body from cold and hunger, and, when sick and suffering, endeavours to restore it to health, so he should regard and treat her.

He that loveth his wife loveth himself.

(1.) Because she is one with him, and their interests are identified.

(2.) Because, by this, he really promotes his own welfare, as much as he does when he takes care of his own body. A man's kindness to his wife will be more than repaid by the happiness which she imparts; and all the real solicitude which he shows to make her happy, will come to more than it costs. If a man wishes to pro- mote his own happiness in the most effectual way, he had better begin by showing kindness to his wife.

(*) "men" "husbands"