As we study the mechanics of our salvation we should always turn back to the fact that God loves us. All of the doctrine regarding our relationship with God and each other must ultimately be founded on the love God has shown for us. Second, by Christ humbling Himself by dying on the cross, He showed God's view of sin. Christ became as sin to pay the penalty for us. Even though Christ remained sinless and is God's Son, as He took our sin upon Himself, God's righteous response to sin was the same.
Sin produces death.
God the Father made Jesus the object of His judgement when Jesus became the sacrifice for our sin. Third, by raising Himself from the grave, Jesus demonstrated both that He is God and also that there is victory over death. Fourth, it also showed His continued love for the disciples and for us. Look at how He forgave Peter in John 21. How often we suffer from righteous indignation when we make some small sacrifice that is not recognised.