2 Corinthians 5:21 "God made him who had no sin to be sin for us, so that in him we might become the righteousness of God."
The message of the Cross of Christ is the foundation principle of all Biblical Doctrine . It is the foundation because it is the first principle of redemption and salvation for all believers were brought about in the mind of God even before the foundation of the world (I Pet. 1:18-20). This means that every single doctrine must be built on the foundation of Christ and the Cross, or else, in some way, it will be phony.
The Cross represents a great value in every believers life because it's message carries the unconditional love of our Lord. He willing gave His only begotten son to be sacrificed for our sins. His son who knew no sin took all the sin's of the world. Those that has been done and those which is yet to occur on His shoulders. Christ [Jesus] bore our sins in His own body on the tree. —1 Peter 2:24
The Cross represents the great exchange that took place on that faithful day through His unconditional love so that we [believers] gain eternal salvation.
Let the same love that took place on the Cross which represents His amazing grace be the foundation upon which you live your life and show the same unconditional love towards others. For by love Christ Jesus said they will know we are His disciples.