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
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 toany 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.