Who is the "whom"?

1 Timothy 6:13-16 KJV
[13] I give thee charge in the sight of God, who quickeneth all things, and before Christ Jesus, who before Pontius Pilate witnessed a good confession;

[14] That thou keep this commandment without spot, unrebukeable, until the appearing of our Lord Jesus Christ:

[15] Which in his times he shall shew, who is the blessed and only Potentate, the King of kings, and Lord of lords;

[16] Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen.

I have a simple question regarding this section of verses from the Bible: to whom (or what) is the underlined "whom" referring?

I'm not looking for a theological debate, or anything of the sort. I just want to know how this breaks down from a strict, grammatical standpoint.

I know this may seem silly, but please, just humor me.

Thank you.