Jesus had some friends, a brother, and two sisters, named: Lazerus, Martha, and Mary. It appears their parents had died, and they were living together. (Perhaps Lazerus was supporting his sisters.) And the three of them appear in a few of Jesus' stories. In one of the stories, Jesus gets word that Lazerus is sick. And Jesus sees an opportunity for God to receive glory. Jesus could have gone to Lazerus, and healed him. But he didn't. He waited.
So, a couple of days later, Jesus announces to his disciples, that it is time to return to Judea, and go to Lazerus, because he has died. And, in this case, it was good that he died, because it would provide an opportunity for God to demonstrate his glory.
When Jesus arrives in his friends home town, he finds that, not only is Lazerus dead, but he has been buried for four days.
Martha comes to Jesus. She is convinced that Jesus has a special relationship with the Father. And Jesus could have saved her borther's life, if he had been there.
Jesus assures Martha that Lazerus will live again. And Martha agrees, "Yes, he will rise at the end of time."
This is the crux of the matter. Jesus says, "I am the resurrection. I am the life." God's plan and mission center around Jesus. Sin has broken mankind's relationship with the Father. Sin has thrown a monkey wrench into mankind's design. The world is broke. And the first step to fixing it is correcting mankind's realtionship with the Father. Without this step, no social action, no 12-step plan, no therapy, will affect the world's brokenness. People are already dead. Jesus will bring the dead out of the grave. Jesus will install them with new life. Life that opens the door, and begins the process of restoring them to their original design.
Then, Martha affirms her confidence in Jesus, and goes to get her sister. Mary comes, and expresses herself in much the same way as Martha did.
Jesus asks to go to the grave site. And when they arrive, he asks for someone to remove the stone, and open the crypt.
Now, Israel is a hot place, so the body has been rotting for fours days. The crypt would obviously reek. And let's consider the state of the body a little more. Decomposition of the body means a breakdown of the body's parts and functions. Muscle and bone are degrading. Nerves and synapses are collapsing. The body's systems would no long function, even if life would suddenly return to the body.
Then, Jesus prays in a loud voice, thanking the Father for his presence, for listening, and for partnering with Jesus. The intent of the prayer is to focus attention on God's involvment and work. Everything about to happen is a work of God. He, only, should receive any glory.
Then, Jesus commands Lazerus to come out. And Lazerus, dead for four days, walks out of the crypt. His spirit is reunited with his body. And all of the body functions, that have been disintegrating for four days during the process of decomposition, are restored and renewed.
This whole incident was intended to demonstrate that, now or later, life is in, and comes through Jesus. And not just as an escape from death. The quality of life come through Jesus. God designed people. The greatest joy and peace flows through living in agreement with his design.