'Spirit of God' in the Bible

For who among men knows the things of a man except the man's spirit within him? So too, no one knows the things of God except the Spirit of God.

The unbeliever does not receive the things of the Spirit of God, for they are foolishness to him. And he cannot understand them, because they are spiritually discerned.

But in my opinion, she will be happier if she remains as she is -- and I think that I too have the Spirit of God!

So I want you to understand that no one speaking by the Spirit of God says, "Jesus is cursed," and no one can say, "Jesus is Lord," except by the Holy Spirit.