John Chrysostom

"Art thou bound unto a wife? Seek not to be loosed. Art thou loosed from a wife? Seek not a wife." These words carry no contradiction to what had been said before but rather the most entire agreement with them. For he says in that place also, "Except it be by consent:" as here he says, "Art thou bound unto a wife? Seek not separation." This is no contradiction. For its being against consent makes a dissolution: but if with consent both live continently, it is no dissolution.

Homily on 1 Corinthians 19 ↗

Theophylact of Ohrid

With the words "are you bound to a wife?" he showed that marriage, as a bond, brings with it troubles. By "divorce" he means not abstinence by mutual agreement, but divorce without sufficient cause; for if the spouses abstain by mutual agreement, then this is not divorce. Having said "do not seek a wife," lest they think he is commanding celibacy, he adds: "but if you do marry, you have not sinned." Notice, meanwhile, how imperceptibly he encourages virginity, calling marriage a bond, and virginity a release and freedom.

Commentary on 1 Corinthians ↗