Lazarus, a man who had died, who after four days in the tomb had been resurrected, authored the Fourth Gospel. I realize that this may be hard for some to receive, so let us back off a little and review the authorship question keeping this in mind only as a possibility. This conclusion depends heavily upon the identity of that mysterious character found only in the Fourth Gospel, and who is designated that disciple whom Jesus loved, so it may be helpful to list every passage where he appears. I will omit here only the story of Lazarus' resurrection, having just listed it above. It is a key passage, however, and will receive special attention later.
This mysterious disciple was present at the Last Supper: When Jesus had thus spoken, he was troubled in spirit, and testified, "Truly, truly I say to you, one of you will betray me." The disciples looked at one another, uncertain of whom he spoke. One of his disciples, whom Jesus loved, was lying close to the breast of Jesus; so Simon Peter beckoned to him and said, "Tell us who it is of whom he speaks." So lying thus, close to the breast of Jesus, he said to him, "Lord, who is it?" (John 13:21-25)
He was present to witness the crucifixion of Jesus, and was entrusted with the care of Mary:
But standing by the cross of Jesus were his mother, and his mother's sister, Mary the wife of Clopas, and Mary Magdalene. When Jesus saw his mother, and the disciple whom he loved standing near, he said to his mother, "Woman, behold, your son!" Then he said to the disciple, "Behold your mother!" And from that hour the disciple took her to his own home. (John 19:25-27)
He was the first to witness the empty tomb, and to believe:
Now on the first day of the week Mary Magdalene came to the tomb early, while it was still dark, and saw that the stone had been taken away from the tomb. So she ran, and went to Simon Peter and the other disciple, the one whom Jesus loved, and said to them, "They have taken the Lord out of the tomb, and we do not know where they have laid him." Peter then came out with the other disciple, and they went toward the tomb. They both ran, but the other disciple outran Peter and reached the tomb first; and stooping to look in, he saw the linen cloths lying there, but he did not go in. Then Simon Peter came, following him, and went into the tomb; he saw the linen cloths lying, and the napkin, which had been on his head, not lying with the linen cloths but rolled up in a place by itself. Then the other disciple, who reached the tomb first, also went in, and he saw and believed; for as yet they did not know the scripture, that he must rise from the dead. Then the disciples went back to their homes (John 20:1-10).
He was in the boat with the disciples when Jesus revealed himself to them:
Just as day was breaking, Jesus stood on the beach; yet the disciples did not know that it was Jesus. Jesus said to them, "Children, have you any fish?" They answered him, "No." He said to them, "Cast the net on the right side of the boat and you will find some." So they cast it, and now they were not able to haul it in, for the quantity of fish. That disciple whom Jesus loved, said to Peter, "It is the Lord.!" When Simon Peter heard that it was the Lord, he put on his clothes, for he was stripped for work, and sprang into the sea. But the other disciples came in the boat, dragging the net full of fish, for they were not far from land, but about a hundred yards off (John 21:4-8).
He was present at the last conversation of Jesus with his disciples: Peter turned and saw following them the disciple whom Jesus loved, who had lain close to his breast at the supper and had said, "Lord, who is it that is going to betray you?" When Peter saw him, he said to Jesus, "Lord, what about this man?" Jesus said to him, "If it is my will that he remain until I come, what is that to you? Follow me!" The saying spread abroad among the brethren that this disciple was not to die; yet Jesus did not say to him that he was not to die, but, "If it is my will that he remain until I come, what is that to you?" This is the disciple who is bearing witness to these things, and who has written these things; and we know that his testimony is true (John 21:20-24).
These are the passages that refer to our mysterious disciple. Let me now suggest a set of circumstances that are highly compatible with what we know of the disciples prior to the crucifixion and resurrection of Jesus, not only from the Fourth Gospel, but from all of them. The Gospels present the disciples as nothing if not human. They are doubters; they are quarrelers; they grumble; they vie with one another for the chief places at the Lord's right and left hand; they are envious; they are ambitious for power and glory; they sleep at a critical time; they are men "of little faith." We can safely apply all these characteristics to all the disciples, including but not limited to the twelve apostles, for there were many disciples in addition to the twelve, some of whom were very close to the Lord, and this would include Mary, Martha, and their brother, Lazarus, who resided in the village of Bethany, on the Mount of Olives east of and near Jerusalem. It appears that it was in their home that Jesus resided when he was in that district. When Jesus heard of Lazarus' illness, he announced to the accompanying disciples, "Our friend, Lazarus, is ill." This suggests two categories of disciples: the apostles, and the others, not called to be apostles, whom Jesus designates "friends." This category includes, most specifically, the person of Lazarus.