Jesus shared in our biological nature.
Not only did our sinful life die forever, in the body of Jesus Christ on the cross, but also, Jesus destroyed the power of death. “In as much then as the children have partaken of flesh and blood, He Himself likewise shared in the same, that through death He might destroy him who had the power of death, that is, the devil, and release those who through fear of death were all their lifetime subject to bondage.” Hebrews 2:14, 15, NKJV. The author of the Hebrews makes an important distinction about the children, the members of the humankind. He states that they “partake”; while about Jesus, he states that He “shared in the same.” The members of the humankind partake the same or have in common, the spirit, (the life), and the biological nature, flesh and blood. Jesus, however, at the incarnation took on Himself the same order of spirit the humankind had before the sin in the garden of Eden; but He shared in the biological nature the sinful humankind had at the time of the incarnation. In this way Jesus fully identified with the humankind He came to redeem; but, He had the spirit which did not sin and, thus, was fully qualified to be the Savior of the entire humankind.
What Jesus did is not a natural step, but His willful and a deliberate act on behalf of the helpless humankind. The Lord Jesus shared in something that was not natural to Him, that is, the flesh and blood that was subjected to consequences of sin, by the first Adam in the garden of Eden. However, by conquering the temptation He was made perfect and, therefore, his body was sanctified. The God-incarnate, the Son, by dying as the sinful humankind, on the cross at Golgotha, destroyed the power of death, the second death. Jesus, on the cross at Golgotha, did not annihilate the Satan, but defeated him, or rendered him inoperative; and thus, Jesus made the second death inoperative. God, at the end of the Millennium, will annihilate Satan and the second death forever.
The author of the Hebrews emphasizes that He who is superior to the angels did not become lower than the angels to save them but to save the sinful and helpless humankind. Jesus did this so that He could be our faithful and merciful High Priest. As such, Jesus lives to always represent us to the Father as His justified and holy children, in Christ Jesus, and only in Him. Jesus was tempted in the same body and on the same points as did the humankind, in the garden of Eden. He said NO to Satan, and thus, He won the victory for us and is fully able to help us in all circumstance. The God-incarnate, the Son, has, while in the body here on earth, accomplished for us what no angel could ever do. In Him, we have it all!