The tombs also were opened. And many bodies of the saints who had fallen asleep were raised, and coming out of the tombs after his resurrection they went into the holy city and appeared to many. (Matthew 27:52, 53 ESV)
What happens after you die? That is the question of upmost importance to so many thinkers. There are a multitude of varying opinions and ideas. Some think nothing waits after the last breath is drawn. And for everyone else there many belief systems.
Christianity, like Old Testament Judaism, presents the notion of an afterlife in which you retain your identity. An eternal existence spent in either Heaven or Hell. The remarkable event of the mass revivifaction witnessed after the crucifixion points out the truth of the afterlife. All of those people, called saints, came back for a period. People saw them and knew them.
Jesus died, but what happens when the Immortal One wraps Himself in mortality and allows it to be extinguished? Well, death has no hold on the One who conceived of life itself. Jesus would rise from the dead.