Like the similitude. Gabriel veiled his brightness and appeared in human form (see SL 52).
The vision. Some commentators consider that Daniel here refers to the vision of chs. 8 and 9; others believe that it was the present revelation that afflicted the prophet so acutely. In view of the fact that the term “vision” in both vs. 1 and 14 seems to apply to the revelation in chs. 10-12, and also because Daniel’s statement here in ch. 10:16 is a logical continuation of his reaction (v. 15) to the angel’s declaration concerning “the vision” (v. 14), it seems reasonable to conclude that the prophet is here speaking of the vision of divine glory he was witnessing.