1 Corinthians 2:10

2:10 God has revealed these to us by the Spirit. For the Spirit searches all things, even the deep things of God.

1 Corinthians 2:12

2:12 Now we have not received the spirit of the world, but the Spirit who is from God, so that we may know the things that are freely given to us by God.

1 Corinthians 2:16

2:16 For who has known the mind of the Lord, so as to advise him? ¹  But we have the mind of Christ.

[2:16]  ¹ sn A quotation from Isa 40:13.