Daniel 8:18 - Albert Barnes' Notes on the Bible

Now, as he was speaking with me, I was in a deep sleep on my face toward the ground - Overcome and prostrate with the vision. That is, he had sunk down stupified or senseless. See Daniel 10:9. His strength had been entirely taken away by the vision. There is nothing improbable in this, that the sudden appearance of a celestial vision, or a heavenly being, should take away the strength. Compare Genesis 15:12; Job 4:13, following; Judges 6:22; Judges 13:20, Judges 13:22; Isaiah 6:5; Luke 1:12, Luke 1:29; Luke 2:9; Acts 9:3, Acts 9:8. “But he touched me, and set me upright.” Margin, as in Hebrew, “made me stand upon my standing.” He raised me up on my feet. So the Saviour addressed Saul of Tarsus, when he had been suddenly smitten to the earth, by his appearing to him on the way to Damascus: “Rise, and stand upon thy feet,” etc., Acts 26:16.