When Jesus said that "he was the resurrection," he was claiming that he was the source of all life; he was claiming that he was divine. Jesus does more than give life; he is life and therefore death has no ultimate power over him. And he assures life to those who believe in him. He promises them eternal life.
Martha proclaimed her faith in Jesus: "Yes, Lord, I have come to believe that you are the Christ, the Son of God, he who is coming into the world."
The resurrection of Lazarus foreshadowed the resurrection of Jesus, except that it was the mortal life of Lazarus which was restored; Lazarus would die again. In the resurrection of Jesus, he conquered death; through his resurrection he has invited all of us to rise also to eternal life with him, "Whoever believes in me, though he die, shall live."
Do we believe these words of Jesus? When Jesus raised Lazarus from the dead, he told the people to remove the stone at the tomb so Lazarus could come out. Similarly we ask the Lord to remove from in front of us those things which keep us from a full life with Christ: this is what faith is all about - to remove whatever hinders us in allowing Jesus to be the Lord of our life.