World Wide Study Bible
a Bible passage
8. Then went in … that other disciple which came first to the sepulchre—The repetition of this, in connection with his not having gone in till after Peter, seems to show that at the moment of penning these words the advantage which each of these loving disciples had of the other was present to his mind.
and he saw and believed—Probably he means, though he does not say, that he believed in his Lord's resurrection more immediately and certainly than Peter.