1 Corinthians 2:11

9 Rather, as it is written: “No eye has seen, no ear has heard, no heart has imagined, what God has prepared for those who love Him.”

10 But God has revealed it to us by the Spirit. The Spirit searches all things, even the deep things of God.

For who among men knows the thoughts of man except his own spirit within him? So too, no one knows the thoughts of God except the Spirit of God.

12 We have not received the spirit of the world, but the Spirit who is from God, that we may understand what God has freely given us.

13 And this is what we speak, not in words taught us by human wisdom, but in words taught by the Spirit, expressing spiritual truths in spiritual words.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
For who among men knows the thoughts of man except his own spirit within him? So too, no one knows the thoughts of God except the Spirit of God.
KJV
For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.
WEB
For who among men knows the things of a man except the spirit of the man which is in him? Even so, no one knows the things of God except God’s Spirit.
ASV
For who among men knoweth the things of a man, save the spirit of the man, which is in him? even so the things of God none knoweth, save the Spirit of God.
DARBY
For who of men hath known the things of a man except the spirit of the man which is in him? thus also the things of God knows no one except the Spirit of God.
BLB
For who of men knows the [things] of the man except the spirit of the man that [is] in him? So also, no one has known the [things] of God except the Spirit of God.
ÅB
for hvem iblant mennesker vet hva som bor i mennesket, uten menneskets ånd, som er i ham? Slik vet heller ingen hva som bor i Gud, uten Guds Ånd;
OTB
For hvem blant mennesker kjenner en persons tanker unntatt personens egen ånd? På samme måte er Guds tanker kjent av ingen unntatt Guds Ånd.
B1930
for hvem iblandt mennesker vet hvad som bor i mennesket, uten menneskets ånd, som er i ham? Således vet heller ingen hvad som bor i Gud, uten Guds Ånd;

Study notes (Tyndale)

Original text and word study

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