John 20:8

And he saw and believed] Why did John believe? Probably because the body of Jesus had miraculously passed through the thick folds of the graveclothes, leaving them unmoved and untouched, just as, on the evening of the same day, the risen Lord appeared in the midst of the disciples, when the doors were shut. It was clear from the position of the clothes, which had not been unwound, that no human hands had removed the Lord's body, and further, since His body had passed unimpeded through solid matter, that it was now a spiritual and glorious body, not bound by the laws of terrestrial matter. Jesus had risen, therefore, not to an earthly but to a heavenly life.