Hebrews 2:14 (KJV) Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil;
We are reminded that we are human, not angelic in nature. Jesus Himself left Heaven and took upon Himself this same nature, He became man. He went to the death of the cross to defeat Satan. Jesus atoned for all sin, and in doing such He removed the cause of spiritual death for all who will believe in what He did.
(Read Hebrews 4:15-16)