Why could Christ die for the sins of every human being?
Christ could die for every human being because He is the Creator God, the Lord Jesus in His Old Testament personality, omnipotent, omniscient, and all-knowing. Had He been anything less, His death would have accomplished nothing. As the God of glory, He alone could suffer the punishment and penalty for every human being.
Les explains that the key is who Christ is: He was the Creator, the Lord Jesus in His Old Testament personality, the Creator God—omnipotent, omniscient, all-knowing. If He had been anything less, His death would have been for nothing; He would have died just like the thief on either side. But because He was the Creator, the God of glory, He could suffer the punishment and penalty for every human being. Les connects this to believing the gospel: Christ died my death and took my punishment, and when the Spirit opens the heart to believe, the old sin nature is considered crucified and Christ begins to live in us, which Les calls the new nature.