What does Daniel 8:16 mean?
In response to his desire (Daniel 8:15) to understand his vision (Daniel 8:1–2), Daniel heard a man's voice. The voice arises from between the banks of the canal where Daniel saw symbolic images of a ram and goat (Daniel 8:3–12). That this voice seems to command the angel, with authority, implies the voice of Jesus. Just as Daniel received help to understand his vision, even so the believer receives help to understand God's Word (John 14:26).This verse is the first time Scripture identifies an angel by name. The same being, Gabriel, will be mentioned later in connection with Daniel's other visions (Daniel 9:21). This is the messenger God sends to announce the births of John the Baptist and of Jesus (Luke 1:19, 26). Gabriel's name literally means "warrior of God" or "man of God."
Another possibility is that the speaker is the archangel, Michael (Jude 1:9). Michael is the only other angel mentioned by name in the Bible (Daniel 10:13, 21; 12:1; Revelation 12:7).