And the vision of the evening and the morning - That is, of the two thousand three hundred days. See Daniel 8:14, and the margin on that verse. The meaning here is, “the vision pertaining to that succession of evenings and mornings.” Perhaps this appellation was given to it particularly because it pertained so much to the evening and morning sacrifice.
Is true - Shall be certainly accomplished. This was said by the angel, giving thus to Daniel the assurance that what he had seen Daniel 8:9-14 was no illusion, but would certainly come to pass.
Wherefore shut thou up the visions - Seal it up. Make a record of it, that it may be preserved, and that its fulfillment may be marked. See the notes at Isaiah 8:16.
For it shall be for many days - That is, many days will elapse before it will be accomplished. Let a fair record, therefore, be made of it, and let it be sealed up, that it may be preserved to prepare the people for these events. “When” these things would come thus fearfully upon the people of Judea, they would be the better able to bear these trials, knowing the period when they would terminate.