Understanding the Purpose of the Resurrection

Regarding Lazarus... Jesus didn't heal Lazarus before his death because Jesue wanted to "raise" Lazarus from death.

John 11:41-44
So they took away the stone. Then Jesus looked up and said, "Father, I thank you that you have heard me. I knew that you always hear me, but I said this for the benefit of the people standing here, that they may believe that you sent me."

When he had said this, Jesus called in a loud voice, "Lazarus, come out!"

The dead man came out, his hands and feet wrapped with strips of linen, and a cloth around his face.

Jesus said to them, "Take off the grave clothes and let him go."

If Christ raised Lazarus from the dead by saying, "Lazarus, come forth," I KNOW and assured that when Jesus returns and says to His own, "JIM, Come forth," I will come be gathered to be with Him forever. That's MY hope. When Jesus said, "I am the resurrection, and the life" (Jn. 11:25). He was stating that He not only heals but able to raise people from death. God's promise is eternal because Christ is the mediator of the covenant, that we receive the promised eternal inheritance. With that promise, as a Christian, I always thank God continually for my guarantee of my spiritual security and freedom in Christ. Christ is the mediator of the new covenant, that we receive the promised eternal inheritance.

1 Peter 1:3-5 Praise be to the God and Father of our Lord Jesus Christ! In his great mercy he has given us new birth into a living hope through the resurrection of Jesus Christ from the dead, and into an inheritance that can never perish, spoil or fade—kept in heaven for you, who through faith are shielded by God's power until the coming of the salvation that is ready to be revealed in the last time.