The Apostle Paul
1 Corinthians 2:11ESV·traditional attribution

For who knows a person’s thoughts except the spirit of that person, which is in him? So also no one comprehends the thoughts of God except the Spirit of God.

John Calvin Reformed @genevareformer

11. For what man knoweth? Two different things he intends to teach here: first, that the doctrine of the Gospel cannot be understood otherwise than by the testimony of the Holy Spirit; and secondly, that those who have a testimony of this nature from the Holy Spirit, have an assurance as firm and solid, as if they felt with their hands what they believe, for...

Matthew Henry Presbyterian @wholebiblehenry

In this part of the chapter the apostle shows them that though he had not come to them with the excellency of human wisdom, with any of the boasted knowledge and literature of the Jews or Greeks, yet he had communicated to them a treasure of the truest and the highest wisdom: We speak wisdom among those who are perfect (Co1 2:6), among those who...

Commenting on 1 Corinthians 2:6-16

John Gill Reformed Baptist @doctorgill

Now we have received not the spirit of the world,.... Meaning either Satan, the god of the world, the spirit that is in it, and rules over it; or the sinful carnal disposition of the men of the world, which is a spirit of covetousness, uncleanness, pride, malice, and error; or rather the carnal wisdom of the world, which is common to worldly men, lies...