'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 [in a sense] a fire, the very world of injustice and unrighteousness; the tongue is set among our members as that which contaminates the entire body, and sets on fire the course of our life [the cycle of man’s existence], and is itself set on fire by hell (Gehenna).

For every species of beasts and birds, of reptiles and sea creatures, is tamed and has been tamed by the human race.

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 [with the same physical, mental, and spiritual limitations and shortcomings], and he prayed intensely for it not to rain, and it did not rain on the earth for three years and six months.