'Spirit of God' in the Bible

For what person knows the thoughts and motives of a man except the man’s spirit within him? So also no one knows the thoughts of God except the Spirit of God.

But the natural [unbelieving] man does not accept the things [the teachings and revelations] of the Spirit of God, for they are foolishness [absurd and illogical] to him; and he is incapable of understanding them, because they are spiritually discerned and appreciated, [and he is unqualified to judge spiritual matters].

But in my opinion a widow is happier if she stays as she is. And I think that I also have the Spirit of God [in this matter].

Therefore I want you to know that no one speaking by the [power and influence of the] Spirit of God can say, “Jesus be cursed,” and no one can say, “Jesus is [my] Lord,” except by [the power and influence of] the Holy Spirit.

If anyone thinks and claims that he is a prophet [a true spokesman for God] or spiritually astute [filled with and energized by the Holy Spirit], let him recognize that the things which I write to you are the Lord’s commandment.