‘And behold a hand touched me, which set me on my knees and on the palms of my hands.'
‘A hand touched me' probably means that he felt himself seized by a powerful hand, compare Daniel 8:18 where it lifted him onto his feet, also Daniel 9:21. Here it set him on his hands and knees. His awareness of the powerful and holy figure before him prevented him rising to his feet. He probably felt too weak. But there was something symbolic here. He was on all fours as a beast but he was to be raised to stand up like a man.