'Spirit of God' in the Bible

For who among men knows the thoughts of a man except the spirit of the man that is in him? In the same way, no one knows the thoughts of God except the Spirit of God.

Don’t you yourselves know that you are God’s sanctuary and that the Spirit of God lives in you?

But she is happier if she remains as she is, in my opinion. And I think that I also have the Spirit of God.

Therefore I am informing you 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.