But I will shew thee that which is noted in the scripture of truth: and there is none that holdeth with me in these things, but Michael your prince. Noted in the scripture of truth - Perhaps this refers to what he had already written down. See the preceding visions, which Daniel did not fully understand, though a general impression from them had filled his heart with sorrow.
Michael your prince - The archangel mentioned before, Daniel 10:13, and who has been always supposed to be appointed by God as the guardian of the Jewish nation. It appears that God chose to make use of the ministry of angels in this work; that angels, as they could be only in one place at one time, could not produce influence where they were not; and that, to carry on the operation on the mind of the Persian king, it was necessary that either Gabriel or Michael should be present with him, and when one went on another commission another took his place; see Daniel 10:13. But we know so little of the invisible world that we cannot safely affirm any thing positively.
Commentary on the Bible, by Adam Clarke [1831].