Nevertheless I tell you the truth. — The words He is about to utter are words of strange sound for the ears of disciples, and He prefaces them by an appeal to His own knowledge and candour in dealing with them, as in John 14:2. The pronoun bears the weight of the emphasis, “I, who know all.”
It is expedient for you that I go away. — “There is no cause,” He would say, “for the deep sorrow which has filled your hearts. It is for your advantage that I, as distinct from the Paraclete, who is to come, should go away” (John 14:16). Yes; for those who had left all to follow Him; for those who had none to go to but Himself (John 6:68); for those whose hopes were all centred in Him, it was — hard and incomprehensible as the saying must have seemed — an advantage that He should go away.
For if I go not away, the Comforter will not come unto you. — Better,... the Advocate will not come unto you. (Comp. Excursus G.) For the connection between the departure of Christ and the coming of the Advocate, comp. Notes on John 7:39, and Acts 2:33. We may not fathom the deep counsels of God in which the reason of these words is to be found; but the order fixed in these counsels was that the Son of Man should complete His work on earth, and offer the sacrifice of Himself for sin, and rise from the dead, and ascend to the Father’s throne, before the Advocate should come. The Son of Man was to be glorified before the Spirit was to be given. Humanity was to ascend to heaven before the Spirit could be sent to humanity on earth. The revelation of saving truth was to be complete before inspiration was to breathe it as the breath of life into man’s soul. The conviction of sin, righteousness, and judgment could only follow the finished work of Christ.
But if I depart, I will send him unto you. — Our translators have sought to show the distinction between the words used in the earlier clauses, “I go away,” and that used here, “I depart”; but probably few English readers will have observed it. The former word means, “I go away from you,” the latter, “I go away to the Father.” For the thought of this clause, comp. Note on John 14:16; John 15:25.