John Calvin Reformed @genevareformer

We have previously given a brief explanation of all these subjects. But here the angel removes all doubt, lest we should still anxiously inquire the meaning of the ram which Daniel saw, and of the he-goat which followed and prostrated the ram. The angel, therefore, here pronounces the ram to represent two kingdoms, which coalesced in one.

Matthew Henry Presbyterian @wholebiblehenry

Here we have, I. Daniel's earnest desire to have this vision explained to him (Dan 8:15): I sought the meaning. Note, Those that rightly know the things of God cannot but desire to know more and more of them, and to be led further into the mystery of them; and those that would find the meaning of what they have seen or heard from God...

Commenting on Daniel 8:15-27

John Gill Reformed Baptist @doctorgill

The ram which thou sawest having two horns,.... Here begins the particular explanation of the above vision, and of the first thing which the prophet saw in it, a ram with two horns: which two horns, he says, are the kings of Media and Persia; Darius the first king was a Mede, and Cyrus, that succeeded him, or rather reigned with him, was a Persian...