John Calvin Commentary Isaiah 14:15

"Yet thou shalt be brought down to Sheol, to the uttermost parts of the pit." — Isaiah 14:15 (ASV)

But you will be brought down to the grave. He previously explained the intention of the king of Babylon, which was that he would place his throne above the clouds; but he now contrasts this with an opposite event, namely, the sides of the pit or ditch, that is, some corner of a sepulcher into which he will be thrown.

He had previously said that the king of Babylon wished to be carried up to Mount Zion, to the sides of the north, because that was a very lofty and widely seen situation. He now uses the word sides in an opposite sense, as if he had said that he would have a place in the most contemptible part of a sepulcher, as when one is thrust into a lowly and despicable corner.

In a wide and large sepulcher, they place the dead bodies of honorable men in the middle; but the Prophet means that he will be thrown into a corner or into the outer edges. Thus the Lord from on high laughs at the pride of the ungodly, so that when they have swallowed up everything by their covetousness and have burst through the clouds and heaven itself by their effrontery, he will finally expose them to the mockery of all, after having overturned their schemes in the twinkling of an eye.