Zacharias said to the angel, "How can I be sure of this? For I am an old man, and my wife is well advanced in years."
Unquestionably, the Lord beheld in Zacharias something worse than his words may bear, and therefore his anger was kindled against him for throwing back with distrust the promised favor. We have no right, indeed, to lay down a law to God which would not leave him free to punish in one the fault which he pardons in others. But it is very evident that the case of Zacharias was widely different from that of Abraham, or Gideon, or Mary. This does not appear in the words; and therefore the knowledge of it must be left to God, whose eyes pierce the depths of the heart. Thus God distinguishes between Sarah’s laugh (Genesis 18:12) and Abraham’s, (Genesis 17:17,) though the one apparently does not differ from the other. The reason why Zacharias doubted was, that, stopping at the ordinary course of nature, he ascribed less than he ought to have done to the power of God. They take a narrow and disparaging view of the works of God, who believe that he will do no more than nature holds out to be probable, as if his hand were limited to our senses or confined to earthly means. But it belongs to faith to believe that more can be done than carnal reason admits. Zacharias had no hesitation with regard to its being the voice of God, but as he looked too exclusively at the world, an indirect doubt arose in his mind if what he had heard would really happen. In that respect he did no slight injury to God, for he went so far as to reason with himself, whether God, who had undoubtedly spoken to him, should be regarded as worthy of credit. 