Early church councils determined that Jesus was one with the Father, and as incarnated, was of the same essence as human beings. They described it as a hypostatic union. The spirit of man is mentioned in the New Testament, and on the cross, Jesus cried out, "'Father, into Your hands I commit My spirit'" (Lk 23:46). Humans have a soul. Paul said "may your spirit and soul and body be preserved complete" (1Th 5:23). In Gethsemane Jesus exclaimed, "'My soul is deeply grieved, to the point of death'" (Mt 26:38). Hebrews explains "He had to be made like his bretheren in all things" (2:16) being "tempted in all things as we are" (4:15). He shared in an existential humanity as experienced by normal people and was not given an "ideal" humanity where he would be immune from temptation. "Since the children share in flesh and blood, He Himself likewise also partook of the same, that through death He might render powerless him who had the power of death, that is, the devil" (2:14). He "canceled out the certificate of debt consisting of decrees against us, which was hostile to us" (Col 2:14). An elder said, "'The Root of David, has overcome'" (Rev 5:5). Jesus said, "'I was dead, and behold, I am alive forevermore, and have the keys of death and of Hades'" (1:18).
When you redeem something you buy it back as if retrieving it from a pawnshop. We've all seen movies where someone is kidnapped and a ransom is demanded. There is a price for releasing a captive. Mankind has been in bondage to sin. But Jesus "became a curse for us" (Gal 3:13) and we are "bought with a price" (1Co 6:20). His "death has taken place for the redemption of the transgressions" (Heb 9:15) and it is he "in whom we have redemption, the forgiveness of sins" (Col 1:14). He is the "one mediator also between God and man . . . who gave Himself as a ransom for all" (1Ti 2:5-6). We are "justified as a gift by His grace through the redemption which is in Christ Jesus" (Ro 3:24). "In Him we have redemption through His blood" (Eph 1:7). "You were not redeemed with perishable things . . . but with precious blood" (1Pe 1:19). "Through His own blood, He entered the holy place once for all, having obtained eternal redemption" (Heb 9:12).