'Nature' in the Bible

who were begotten as such not by human descent, nor through an impulse of their own nature, nor through the will of a human father, but from God.

and He did not need anyone to testify concerning man [and human nature], for He Himself knew what was in man [in their hearts—in the very core of their being].

The Spirit is the one who gives life; human nature is of no help! The words that I have spoken to you are spirit and are life.

You are of your father the Devil, and you want to carry out your father’s desires. He was a murderer from the beginning and has not stood in the truth, because there is no truth in him. When he tells a lie, he speaks from his own nature, because he is a liar and the father of liars.