Now after the Sabbath, as it began to dawn toward the first day of the week, Mary Magdalene and the other Mary came to look at the grave. And behold, a severe earthquake had occurred, for an angel of the Lord descended from heaven and came and rolled away the stone and sat upon it. And his appearance was like lightning, and his clothing as white as snow.
The guards shook for fear of him and became like dead men. The angel said to the women, "Do not be afraid; for I know that you are looking for Jesus who has been crucified. He is not here, for He has risen, just as He said. Come, see the place where He was lying. Go quickly and tell His disciples that He has risen from the dead; and behold, He is going ahead of you into Galilee, there you will see Him; behold, I have told you."
And they left the tomb quickly with fear and great joy and ran to report it to His disciples.
Matthew 28:1-8 (NASB)
The greatest truth of Christianity is the literal, bodily Resurrection of the Lord Jesus Christ. The Gospel, as defined in 1 Corinthians 15, is that Jesus died on the cross according to the Scriptures, that He was buried and that He rose again on the third day according to the Scriptures. Death and sin have been defeated. We can have new life in Christ and live and reign forever with Him because of the Resurrection. That's Good News worth telling!