Prior to even being nailed upon the cross, Jesus underwent a severe flogging. They took a whip and hit him 39 times. It is said that this whip would cut into skin, leaving the muscles exposed, and then just to top things off, it would cut the muscle itself. One can barely imagine the pain and blood loss that would occur under this type of torture.
But Jesus was still alive. He was then forced to carry his cross up Calvary, meanwhile being yelled at and hit no doubt, until he had no strength left in his body. They nailed through his hands and put him on the cross. It is said that more people die from suffocation on the cross than anything else. There He was, the author of all time, the Creator of the universe, and the source of life on a cross with no feeling, but pain, struggling to stay alive. And he proclaims there for all to hear,
"My God, my God, why hast thou forsaken me?" -Matthew 27:46
He was condemned for doing no wrong, undergoing such torture that he felt he was forsaken, and yet Isaiah 53:10 proclaims,
"Yet it pleased the Lord to bruise him; he hath put him to grief."
Why, Lord, why? Why would you ever feel that putting this torture on your Son, on You Yourself, would ever be pleasing? What could have compelled you to such a thought?
Looking at the context of Isaiah 53 (I strongly recommend you take the time to read the whole chapter), we find our answer. You of course, already know it. You're taught it all the time. He did it for the world,
"3 He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from him; he was despised, and we esteemed him not. 4 Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted. 5 But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed... 11 He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities."
Jesus didn't just die for us, he underwent torture. Yet we aren't willing to do anything for him. How is that we are so selfish when we are human nothings, while the Creator of the universe, the all-powerful being, made the ultimate sacrifice for us?