'Nature' in the Bible

The Son is the radiance of God’s glory and the exact expression of His nature, sustaining all things by His powerful word. After making purification for sins, He sat down at the right hand of the Majesty on high.

For it was fitting for God [that is, an act worthy of His divine nature] that He, for whose sake are all things, and through whom are all things, in bringing many sons to glory, should make the author and founder of their salvation perfect through suffering [bringing to maturity the human experience necessary for Him to be perfectly equipped for His office as High Priest].

Therefore, since [these His] children share in flesh and blood [the physical nature of mankind], He Himself in a similar manner also shared in the same [physical nature, but without sin], so that through [experiencing] death He might make powerless (ineffective, impotent) him who had the power of death—that is, the devil—

For verily he took not on him the nature of angels; but he took on him the seed of Abraham.

For the word of God is living and active and full of power [making it operative, energizing, and effective]. It is sharper than any two-edged sword, penetrating as far as the division of the soul and spirit [the completeness of a person], and of both joints and marrow [the deepest parts of our nature], exposing and judging the very thoughts and intentions of the heart.

by the new and ever-living way which He opened up for us through the rending of the veil--that is to say, of His earthly nature--