John Chrysostom
Catena Aurea · Lukasevangelium 1
And Zacharias said unto the angel, Whereby shall I know this? for I am an old man, and my wife well stricken in years. And the angel answering said unto him, I am Gabriel, that stand in the presence of God; and am sent to speak unto thee, and to shew thee these glad tidings. And, behold, thou shalt be dumb, and not able to speak, until the day that these things shall be performed, because thou believest not my words, which shall be fulfilled in their season. And the people waited for Zacharias, and marvelled that he tarried so long in the temple. And when he came out, he could not speak unto them: and they perceived that he had seen a vision in the temple: for he beckoned unto them and remained speechless.
(Hom. ii. De Inc. Nat. Dei sup.) Considering his own age, and moreover the barrenness of his wife, Zacharias doubted; as it is said, And Zacharias said unto the angel, Whereby shall I know this? as if he said, “How shall this be?” And he adds the reason of his doubting; For I am an old man. An unseasonable time of life, an ill-suited nature; the planter infirm, the soil barren. But it is thought by some a thing unpardonable. in the priest, that he raises a course of objections; for whenever God declares any thing, it becomes us to receive it in faith, and moreover, disputes of this kind are the mark of a rebellious spirit. Hence it follows; And the angel answering said unto him, I am Gabriel, who stand before God.