The Lord Jesus Christ, the true God-Man came to earth to reveal the Father, to be an example to man of righteous living, to sympathize with man’s problems–but most significantly, He came to die. Without His death, His life doesn’t make sense.
We were under the death penalty. We deserved to die. He became our pardon. When He died on the cross He took our penalty. His death gave us life.
Isaiah 53:4-6 Surely he has borne our griefs and carried our sorrows; yet we esteemed him stricken, smitten by God, and afflicted. 5 But he was wounded for our transgressions; he was crushed for our iniquities; upon him was the chastisement that brought us peace, and with his stripes we are healed. 6 All we like sheep have gone astray; we have turned–every one–to his own way; and the Lord has laid on him the iniquity of us all. (ESV)
Colossians 2:13-15 And you, who were dead in your trespasses and the uncircumcision of your flesh, God made alive together with him, having forgiven us all our trespasses, 14 by canceling the record of debt that stood against us with its legal demands. This he set aside, nailing it to the cross. 15 He disarmed the rulers and authorities and put them to open shame, by triumphing over them in him. (ESV)
Hebrews 9:27-28 And just as it is appointed for man to die once, and after that comes judgment, 28 so Christ, having been offered once to bear the sins of many, will appear a second time, not to deal with sin but to save those who are eagerly waiting for him. (ESV)