1 Peter 2:24 KJV
Who his own self bare our sins in his own body on the tree, that we, being dead to sins, should live unto righteousness: by whose stripes ye were healed.
The cross is a sign and symbol of God's judgment on sin, the cross symbolize the total and complete triumph over the devil and sin that shook the very foundation of hell itself.
There is notting in history or eternity that can be compared with sacrifice that Jesus did at the cross, it can never be replaced nor can it be changed. He made it totally and completely possible for the entire human race to be connected and have a close and personal relationship with God. He made redemption and salvation a free gift and the foundation of our human race, His sacrifice made it possible for us to communicate with the Father without having to do series of sacrifices.
The event of the cross was not just something that happened to Christ along His stay on earth, the cross was His mission from the very beginning, it was His purpose in coming that had already been ordained since the foundation of the world.
Revelation 13:8 KJV
And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.
The coming of Christ in Human form would have been useless without the event of the cross. He came in human form so he could be able to absorb our sins for Himself in exchange for salvation and the power to sin no more.
2 Corinthians 5:21 KJV
For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.
God came in human form to set us free from sin, that we may nolonger be slaves to sin, His coming to earth was not to accomplish a name for Himself. The cross is the final solution to all sins and all our problems, it can never be understood or comprehended by mere human understanding.
Through the event of the Cross, we are able to see God's true nature, which is love, never a love so pure has been seen in all of history, the cross is a symbol of Christ undieing love.
John 3:16 KJV
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
The cross was the place where God and sinful man merged, no matter your faults or your sin, Christ has made a way.
The death of JESUS on the cross was to set us free from sin by asking the father for forgiveness through him and give us salvation