It afterwards follows, that the Prophet inquired of the Angel, What does this mean? We hence learn again, that the Prophet was instructed by degrees, in order that the vision might be more regarded by us; for if the Prophet had immediately obtained the knowledge of what was meant, the narrative might be read by us with no attention; we might at least be less attentive, and some might probably think that it was an uncertain vision. But as the Prophet himself attentively considered what was divinely revealed to him, and yet failed to understand what God meant, we are hereby reminded that we ought not to be indifferent as to what is here related; for without a serious and diligent application of the mind, we shall not understand this prophecy, as we are not certainly more clear-sighted than the Prophet, who had need of a guide and teacher. There is also set before us an example to be imitated, so that we may not despair when the prophecies seem obscure to us; for when the Prophet asked, the Angel immediately helped his ignorance. There is therefore no doubt but that the Lord will supply us also with understanding, when we confess that his mysteries are hid from us, and when conscious of our want of knowledge, we flee to him, and implore him not to speak in vain to us, but to grant to us the knowledge of his truth. The angel’s question to the Prophet, whether he understood or not, is not to be taken as a reproof of his dullness, but as a warning, by which he meant to rouse the minds of all to consider the mystery. He then asked, Art thou ignorant of what this means, in order to elicit from the Prophet a confession of his ignorance. Now if the Prophet, when elevated by God’s Spirit above the world, could not immediately know the purpose of the vision, what can we do who creep on the earth, except the Lord supplies us with understanding? In short, Zechariah again recommends to us the excellency of this prophecy, that we may more attentively consider what God here declares.