In John 9:1-3 the disciples passed by a man blind from birth and asked, “Rabbi, who sinned, this man or his parents, that he was born blind?” Jesus answers, “It was not that this man sinned, or his parents, but that the works of God might be displayed in him.” Some Mormons have used this to argue that the disciples assumed human pre-existence, and that Jesus was endorsing this assumption by not explicitly correcting it.
This is a bad interpretation for three reasons.
1. The Gospel of John is clear and persistent in declaring the unique pre-existence of Jesus in contrast to the rest of humanity, who were “from below.” See the list of such passages at Theopedia (under “Johannine Passages”). This is the most important reason, so it’s crucial that you take a minute to read those passages (John 1:1-2, 15, 18; 3:13, 31; 5:36-38; 6:46, 62; 7:28-29; 8:23, 58; 17:24).
2. Sinning in the womb was regarded as possible by some Jews
3. Even if the disciples had human pre-existence in mind (which seems unlikely), Jesus doesn’t go on confirm this assumption. Rather, he goes on to refute the notion that the man was born blind because of any personal sin. Just because Jesus refutes one assumption of the disciples doesn’t mean he is endorsing the remaining. This point alone does not refute human pre-existence, of course, but in light of #1 and #2, we have no compelling reason to read the story in John 9 in a way that contradicts John’s existenting theme of Jesus’ unique pre-existence.
This is a great example of the importance of letting the explicit govern the implicit, the obvious govern the less obvious, and the whole of a work inform the parts of a work.
