'Nature' in the Bible

For we all stumble and sin in many ways. If anyone does not stumble in what he says [never saying the wrong thing], he is a perfect man [fully developed in character, without serious flaws], able to bridle his whole body and rein in his entire nature [taming his human faults and weaknesses].

And the tongue is a fire, a world of iniquity: so is the tongue among our members, that it defileth the whole body, and setteth on fire the course of nature; and it is set on fire of hell.

For every nature, both of beasts and of fowls, both of creeping things and things of the sea, is subdued, and hath been subdued, by the human nature,

That is not the wisdom which comes down from above: it belongs to earth, to the unspiritual nature, and to evil spirits.

Yet you do not know [the least thing] about what may happen in your life tomorrow. [What is secure in your life?] You are merely a vapor [like a puff of smoke or a wisp of steam from a cooking pot] that is visible for a little while and then vanishes [into thin air].

Elijah was a man with a nature like ours; yet he prayed earnestly that it would not rain, and for three years and six months it did not rain on the land.