Jesus' crucifixion fulfills the plans and purposes of God which had existed BEFORE God created anything. Everything went according to plan. The Son of God was crucified in order to save people from sin.
At the moment of Jesus' death, the curtain of the temple, the curtain which symbolized the separation of God from the people because of sin, was torn in two from top to bottom. It was no longer needed. Jesus had provided the way for all people to come near to God. The way was through his blood. God had provided a Lamb for the sacrifice - the Lamb was His own Son.
Jesus didn't remain dead. Three days after his crucifixion, Jesus rose from the dead - just as he had said he would. Met by an angel, the women were told that Jesus was alive. On their way to tell Jesus' disciples, Jesus met them. They were told to tell the disciples to head to Galilee to the place Jesus told them about before his death.
On the mountain Jesus met his disciples and he commanded them to "go and make disciples of all nations..." They were to teach the nations everything Jesus had taught them. He would be with them as they did.