Albert Barnes Commentary Zechariah 4:1

"And the angel that talked with me came again, and waked me, as a man that is wakened out of his sleep." — Zechariah 4:1 (ASV)

The angel came again - The angel (as before, Zechariah 2:3) had gone out to receive some fresh instruction from a higher angel or from God.

And awakened me - As a man is awakened out of sleep. Zechariah, overwhelmed by the greatness of the visions, must have sunk down in a sort of stupor. This is similar to Daniel's experience after the vision of the ram and he-goat, when, as Gabriel was speaking with him, Daniel says, I was in a deep sleep on my face toward the ground, and he touched me and set me upright (Daniel 8:18). It happened again at the voice of the angel who, after his three weeks’ fast (Daniel 10:9), came to declare to him (Daniel 10:21) the scripture of truth. Likewise, at the Transfiguration, Peter and they that were with him were heavy with sleep, and when they were awake, they saw His glory (Luke 9:32).

Osorius says: "Wondrous and stupendous mysteries were they that were shown to the divine man. He saw the Branch of the Lord; he saw His invincible might; he saw His brightness of Divine Intelligence and Providence; he saw the amplitude of beauty and dignity.

"Then, fixed and struck still with amazement, while he pondered these things in his mind, sunk in a sort of sleep, he is taken beyond himself and, enveloped in darkness, understands that the secret things of Divine Wisdom cannot be perfectly comprehended by any human mind. He then attained this: that, his senses being overpowered, he should see nothing, except that in which is the sum of wisdom—that this immensity of the divine excellence cannot be fathomed. By this sleep he was seized, when he was roused by the angel to see further mysteries."