He does not, however, say where the text came from.

Another main way of seeing the problem is to claim that the writer has used different sources to create his gospel. These sources preceded him in the Christian tradition, and may have included both the synoptic gospels and other non-canonical or lost texts. In putting different sources together, he has been forced to make decisions. When he relied on tradition and not his own account, he is not able to make a coherent well-flowing narrative. It comes out disjointed.

Schnackenburg proposes perhaps the most satisfactory solution. His view is that John 15-16, and John 17 separately, were later insertions to the text done by an editor. He accepts that there is some continuity of content in the discourses following 14:31, which makes chapters 15-17 appropriate. But he accepts also that the transition is overly abrupt, and that the more original...
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