Matthew 1:19

But if he had no suspicion of her, how could he be a just man, and yet seek to put her away, being immaculate? He sought, to put her away, because he saw in her a great sacrament, to approach which he thought himself unworthy.

(in Luc. ii. 5.) St. Matthew has beautifully taught how a righteous man ought to act, 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 he was minded to put her away, he admits to have received her.

"And Joseph her husband, being," saith he "a just man, and not willing to make her a public example, was minded to put her away privily." Having said that it was of the Holy Ghost, and without cohabitation, he establishes his statement in another way again. Lest any one should say, "Whence doth this appear? Who hath heard, who hath seen any such thing ever come to pass?"-or lest you should suspect the disciple as inventing these things to favor his Master;-he introduces Joseph as contributing, by what he underwent, to the proof of the things mentioned; and by his narrative all but says, "If thou doubt, me, and if thou suspect my testimony, believe her husband." For "Joseph," saith he, "her husband, being a just man." By "a just man" in this place he means him that is virtuous in all things. For both freedom from covetousness is justice, and universal virtue is also justice; and it is mostly in this latter sense that the Scripture uses the name of justice; as when it saith, "a man that was just and true;" and again, "they were both just." Being then "just," that is good and considerate, "he was minded to put her away privily." For this intent he tells what took place before Joseph's being fully informed, that thou mightest not mistrust what was done after he knew. However, such a one was not liable to be made a public example only, but that she should also be punished was the command of the law. Whereas Joseph remitted not only that greater punishment, but the less likewise, namely, the disgrace. For so far from punishing, he was not minded even to make an example of her. Seest thou a man under self-restraint, and freed from the most tyrannical of passions. For ye know how great a thing jealousy is: and therefore He said, to whom these things are clearly known, "For full of jealousy is the rage of a husband;" "he will not spare in the day of vengeance:" and "jealousy is cruel as the grave." And we too know of many that have chosen to give up their lives rather than fall under the suspicion of jealousy. But in this case it was not so little as suspicion, the burden of the womb entirely convicting her. But nevertheless he was so free from passion as to be unwilling to grieve the Virgin even in the least matters. Thus, whereas to keep her in his house seemed like a transgression of the law, but to expose and bring her to trial would constrain him to deliver her to die; he doth none of these things, but conducts himself now by a higher rule than the law. For grace being come, there must needs henceforth be many tokens of that exalted citizenship. For as the sun, though as yet he show not his beams, doth from afar by his light illumine more than half the world; so likewise Christ, when about to rise from that womb, even before He came forth, shone over all the world. Wherefore, even before her travail, prophets danced for joy, and women foretold what was to come, and John, when he had not yet come forth from the belly, leaped from the very womb. Hence also this man exhibited great self-command, in that he neither accused nor upbraided, but only set about putting her away.

But how is Joseph thus called just, when he is ready to hide his wife's sin? For the Law enacts, that not only the doers of evil, but they who are privy to any evil done, shall be held to be guilty. Or this may be considered a testimony to Mary, that Joseph, confident in her purity, and wondering at what had happened, covered in silence that mystery which he could not explain.

(De Cons. Evang. ii. 5.) How this was done Matthew omits to write, but Luke relates after the conception of John, In the sixth month the Angel was sent; and again, The Holy Ghost shall come upon thee. This is what Matthew relates in these words, She was found with child of the Holy Ghost. And it is no contradiction that Luke has described what Matthew omits; or again that Matthew relates what Luke has omitted; that namely which follows, from Now Joseph her husband being a just man, to that place where it is said of the Magi, that They returned into their own country another way. If one desired to digest into one narrative the two accounts of Christ's birth, he would arrange thus; beginning with Matthew's words, Now the birth of Christ was on this wise; (Luke 1:5.) then taking up with Luke, from There was in the days of Herod, to, Mary abode with her three months, and returned to her house; then taking up again Matthew, add, She was found with child of the Holy Ghost. (Mat. 1:10.) Otherwise; if you alone have knowledge of a sin that any has committed against you, and desire to accuse him thereof before men, you do not herein correct, but rather betray him. But Joseph, being a just man, with great mercy spared his wife, in this great crime of which he suspected her. The seeming certainty of her unchastity tormented him, and yet because he alone knew of it, he was willing not to publish it, but to send her away privily; seeking rather the benefit than the punishment of the sinner.