Who comprehends the mind of the LORD - Isa 40:13?

Who comprehends the mind of the LORD?

Isa 40:13

“Who comprehends the mind of the LORD, or gives him instruction as his counselor?” NET

“Who hath directed the Spirit of Jehovah, or being his counsellor hath taught him?” ASV

The original Hebrew has the Tetragrammaton – “ה וָ֑ ה יְ” (yhwh), rendered into English, either, as, “Yahweh” or “Jehovah” and not, “LORD”

Now we turn to, 1 Cor 2:16

“For who has known the mind of the Lord, so as to advise him? But we have the mind of Christ.” NET Bible

In 1 Cor 2:16, here Paul is quoting Isa 40:13!

A question for Trinitarians

How is it possible to not know the mind of the “Lord” (Jehovah), but, the mind of Christ, when Christ is supposed to be “Jehovah” (the Lord)?

Letusresaon (aka - Andrew Graham)