Matthew 1:20

But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, son of David, fear not to take unto you Mary your wife: for that which is conceived in her is of the Holy Spirit.
All Commentaries on Matthew 1:20 Go To Matthew 1

Remigius of Rheims

AD 533
Because Joseph was minded, as has been said, to put Mary away privily, which if he had done, there would have been few who would not rather have thought her a harlot than a virgin, therefore this purpose of Joseph was changed by Divine revelation, whence it is said, “While he thought on these things.”
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Knowing this first, that no prophecy of the scripture is of any private interpretation - 2 Peter 1:20

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