Daniel 2:22

revealeth-- (Job 12:22). So spiritually (Eph 1:17-18). knoweth what is in . . . darkness-- (Psa 139:11-12; Heb 4:13). light . . . him-- (Jam 1:17; Jo1 1:4). Apocalypse (or "revelation") signifies a divine, prophecy a human, activity. Compare Co1 14:6, where the two are distinguished. The prophet is connected with the outer world, addressing to the congregation the words with which the Spirit of God supplies him; he speaks in the Spirit, but the apocalyptic seer is in the Spirit in his whole person (Rev 1:10; Rev 4:2). The form of the apocalyptic revelation (the very term meaning that the veil that hides the invisible world is taken off) is subjectively either the dream, or, higher, the vision. The interpretation of Nebuchadnezzar's dream was a preparatory education to Daniel himself. By gradual steps, each revelation preparing him for the succeeding one, God fitted him for disclosures becoming more and more special. In the second and fourth chapters he is but an interpreter of Nebuchadnezzar's dreams; then he has a dream himself, but it is only a vision in a dream of the night (Dan 7:1-2); then follows a vision in a waking state (Dan 8:1-3); lastly, in the two final revelations (Dan 9:20; Dan 10:4-5) the ecstatic state is no longer needed.

— Jamieson-Fausset-Brown Commentary (public domain)