Luke
Luke 2:10BSB·traditional attribution

But the angel said to them, “Do not be afraid! For behold, I bring you good news of great joy that will be for all the people:

John Calvin Reformed @genevareformer

10. Fear not The design of this exhortation is to alleviate their fear. For, though it is profitable for the minds of men to be struck with awe, that they may learn to “give unto the Lord the glory due unto his name,” (Psalm 29:2;) yet they have need, at the same time, of consolation, that they may not be altogether overwhelmed.

Matthew Henry Presbyterian @wholebiblehenry

The meanest circumstances of Christ's humiliation were all along attended with some discoveries of his glory, to balance them, and take off the offence of them; for even when he humbled himself God did in some measure exalt him and give him earnests of his future exaltation.

Commenting on Luke 2:8-20

John Gill Reformed Baptist @doctorgill

And the angel said unto them; fear not,.... For he was not a messenger of bad, but of good tidings: for behold, I bring you good tidings; tidings, that were both wonderful and amazing, and therefore a "behold" is prefixed to them, as well as to excite to attention; and which were good news, and glad tidings, for such the birth of Christ of a...