'Realize' in the Bible

Now we have received, not the spirit of the world, but the [Holy] Spirit who is from God, so that we may know and understand the [wonderful] things freely given to us by God.

Do you not know that the one who joins himself to a prostitute is one body with her? For He says, “The two shall be one flesh.”

But I want you to understand that Christ is the head (authority over) of every man, and man is the head of woman, and God is the head of Christ.