Isn’t this a bit of splitting hairs over the concepts of comprehensive vs. exhaustive? It makes sense we can’t know Jesus exhaustively, any more than we can know our spouses or ourselves exhaustively, but we have been given the comprehensive plan of Christ and it’s by following that plan that we know him more, better and best. We only “lay hold of Christ” at the end of a life that has been totally absorbed by following His plan to build His global family movement, which is communicated in the Apostles’ teaching.