Albert Barnes Commentary 1 Timothy 6:15

"which in its own times he shall show, who is the blessed and only Potentate, the King of kings, and Lord of lords;" — 1 Timothy 6:15 (ASV)

Which in his times he shall show. Which God will reveal at such times as he deems best. It is implied here that the time is unknown to men. (See Barnes on Acts 1:7).

Who is the blessed and only Potentate. God who is the Ruler over all. The word used here—dunasthv—means one who is mighty (Luke 1:52), then a prince or ruler. . It is applied here to God as the mighty ruler over the universe.

The King of kings. Who claims dominion over all the kings of the earth. In Revelation 17:14, the same appellation is applied to the Lord Jesus, ascribing to him universal dominion.

Lord of lords. The idea here is that all the sovereigns of the earth are under his sway; that none of them can prevent the accomplishment of his purposes; and that he can direct the winding up of human affairs when he pleases.