George Haydock's Catholic Bible Commentary - Luke 1:19
The name Gabriel signifies, the strength of God; or, God is my strength. The angels are sometimes styled by proper names, in order to shew their respective duties; thus, no angel could better be appointed to declare the precursor, as also the Messias himself, than he who was styled the power of God: since he came to declare the coming of one who was to destroy the power of the devil, and overthrow his kingdom. (Nicholas of Lyra) See Tobit xii. 15; Apocalypse i. 4. and viii. 2. read more
George Haydock's Catholic Bible Commentary - Luke 1:18
Whereby shall I know this? Zacharias could not question the Divine Power, but he doubted of what the angel told him. (Witham) --- It was customary with the Jews, when they heard that any wonderful event was to take place, to inquire whether the Almighty had manifested his will by any supernatural sign. Zacharias puts this question to the angel, not through any doubt concerning the omnipotence of God, but because what was promised could not be compassed in the natural order of things: for, I am... read more