Merrill Tenney gives his observation about the work of a vinedresser and the pruning process in his commentary on John:
In pruning a vine, two principles are generally observed: first, all dead wood must be ruthlessly removed; and second, the live wood must be cut back drastically. Dead wood harbors insects and diseas…
Eerdmans, John: The Gospel of Belief, by Merrill C. Tenney