They fell on their face - They entered into the cloud, or the cloud enveloped them, Luke 9:34. “They were therefore afraid.” They were awed at the presence of God, and prostrated themselves in solemn adoration on the ground, and their fears were removed only by the voice of their beloved Master. No man can see God and live; and it is only the glory of God, as it shines in the face of Christ (see 2 Corinthians 4:6), that mortals can bear.
Related Commentaries of Matthew 17:6
Matthew 17:6
6 And when the disciples heard it, they fell on their face, and were sore afraid.