I think the entire process of the crucifixion from the method, the mocking, the
humiliation, whipping, to the way it was carried out and ultimately death and the resurrection.
All formed part of the penalty and substitution for our selves.
Isaiah 53:5 NKJV
[5] But He was wounded for our transgressions, He was bruised for our iniquities;
The chastisement for our peace was upon Him, And by His stripes we are healed.
Isaiah 53:7 NKJV
[7] He was oppressed and He was afflicted, Yet He opened not His mouth;
He was led as a lamb to the slaughter, And as a sheep before its shearers is silent,
So He opened not His mouth.
1 Peter 2:24 NKJV
[24] who Himself bore our sins in His own body on the tree, that we, having
died to sins, might live for righteousness-by whose stripes you were healed.
1 Corinthians 5:7 NKJV
[7] Therefore purge out the old leaven, that you may be a new lump, since you
truly are unleavened. For indeed Christ, our Passover, was sacrificed for us.
Death was the finished product - Jesus cried out it is finished.
But everything else that happen also had its place. Jesus gave Himself
up to be physically, mentally and physiological tortured. He turned
himself over to the powers of darkness and hell to win our salvation.
Both during His life and during the sacrifice.
Why? Well for this
Hebrews 4:15-16 NKJV
[15] For we do not have a High Priest who cannot sympathize with our weaknesses,
but was in all points tempted as we are, yet without sin. [16] Let us therefore come
boldly to the throne of grace, that we may obtain mercy and find grace to help in time of need.