Albert Barnes Commentary Daniel 10:15

"and when he had spoken unto me according to these words, I set my face toward the ground, and was dumb." — Daniel 10:15 (ASV)

And when he had spoken these words ... - Daniel was naturally overcome by the communication that had been made to him. The manner in which the prayer was answered seems to have been entirely different from what he had expected.

The presence of a heavenly being; the majesty of his appearance; the assurance that he gave that he had come to answer his prayer; and the fact that he had important revelations to make about the future, overcame him, and he laid his face on the ground in silence. Is there any one of us who would not be awed into profound silence if a heavenly messenger were to stand before us to disclose what was to happen to us, to our families, to our friends, to our country, in far-off years?