The Cross opens the door of relationship to a Perfect, Just, & Holy God. God's justice says any entity that sins or transgresses God known law must die. For the due pay, the "due" result of all sin is death. God is just in destroying us because of our sin. BUT MERCY, LOVE & GRACE! These three things moved God to redeem us. He loves us so much that He extended Grace & Mercy. In order for redemption i.e the establishment of "the new creation" to be accomplished there to be a perfect man who would do what the first Adam failed to do. But not only that he would have to die as a perfect human sacrifice. For god's justice must be satisfied or God is a "lier" WHICH HE DEFINITELY IS NOT! For He told Adam & Eve if they ate form the tree of the knowledge of good and evil they would surely die i.e be separated from God who is the source of life! So God sent His son into the world—Jesus Christ to be our representative man just as Adam & pay the sin debt owed to God. All God requires of us is FAITH, TRUST, SURRENDER, & ACCEPTANCE of/in Jesus Christ and His death on Calvary Cross for us! -It's the Cross that opens wide the door! -It's the Cross that bridges the gap! -It's the Cross that allows us to have relationship with the one & true God. Thank God that Christ has satisfied his JUST demands.