Christ's incarnate nature

Upon His incarnation, it is commonly believed that Christ took upon Himself sin-less human nature, i.e. He was like Adam and Eve before they sinned.

However, Scripture tells us that He came to this world with a fallen human nature, having been made like mankind in all things:

Ro 8:3  For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin, condemned sin in the flesh:

He 2:16,17  For verily he took not on him the nature of angels; but he took on him the seed of Abraham. 

17 Wherefore in all things it behoved him to be made like unto his brethren, that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people.

Php 2:7  But made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men:

This meant that Christ could be tempted like us, but He remained without sin:

He 4:15  For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin.

If Christ had not been made exactly like us (but without sin), he could not have experienced what we experience, and been able to identify wholly with us.

He 2:9  But we see Jesus, who was made a little lower than the angels for the suffering of death, crowned with glory and honour; that he by the grace of God should taste death for every man.

‘Every man’ has a fallen nature. If Christ did not have the fallen nature, when He died upon the Cross the fallen nature (us) could not have died - we could not then be saved.