“Whoever believes in me will live”
“Whoever believes in me, even if he dies, will live; and everyone who lives and believes in me will never die.” What is being said? “Whoever believes in me, even if he is dead like Lazarus, will live” because God is not God of the dead but God of the living. Already concerning Abraham, Isaac and Jacob, those long-dead patriarchs, Jesus had given the same reply: “He is the God of Abraham, the God of Isaac and the God of Jacob; he is not God of the dead but of the living, for to him all are alive” (Lk 20,37-38). Believe, then; and though you were dead, you will live! But if you do not believe, then although you may be living, actually, you are dead... From where comes death in the soul? From the fact that faith is no longer there. From where comes the death of the body? From the fact that the soul is no longer there. The soul's soul is faith.
“Whoever believes in me, even though he die in body will be alive in soul until the body itself rises again to die no more. And whoever lives in the flesh and believes in me, although he must die in his body for a season, will not die for ever because of the life of the Spirit and immortality of the resurrection.”
That is what Jesus' reply to Martha meant... “Do you believe this” “Yes, Lord,” she answered, “I have come to believe that you are the Messiah, the Son of God, the one who is coming into the world. Believing this, I have believed you are the resurrection; I have believed you are the life; I have believed that whoever believes in you, though he die, will live; I have believed that whoever lives and believes in you will never die eternally.”