Then Joseph her husband, being a just man, and not willing to make her a public example, decided to put her away privately.
All Commentaries on Matthew 1:19 Go To Matthew 1
Ambrose of Milan
In Luc., ii, 5: St. Matthew has beautifully taught how a righteous man ought toact, who has detected his wife’s disgrace; so as at once to keep himself guiltless of her blood, and yet pure from her defilements; therefore it is he says, “Being a just man.” Thus is preserved throughout in Joseph the gracious character of a righteous man, that his testimony may be the more approved; for, the tongue of the just speaketh the judgment of truth.
in Luc., ii, 1: But as no one puts away what he has not received; in that hewas minded to put her away, he admits to have received her.