Peter runs to see for himself, but he doesn't have a clue as to what the empty tomb means. That does not happen, however, just because he finds the tomb empty. Scholars put a lot of weight on that word amazed . It does not mean that as soon as Peter saw the empty tomb he grasped the significance of what had happened and believed. To be amazed has nothing to do with being rationally convinced.
Wonder signals the approach of something too marvelous to receive in any other way.
Wonder is the servant of faith, ushering us into the presence of God. Wonder opens your heart and your mind in a way that makes it possible for God to grab hold of you and change you. That's the truth about this resurrection. It is not irrational, but it is more than reasonable. It is a wonder-truth, a truth that is amazing .