I have yet many things to say unto you. — The “many things” are defined by the next verse to be things with regard to which the Spirit of Truth shall be their guide — i.e., they are parts of the revelation which the minds of the disciples are not yet fitted to receive.
Ye cannot bear them now. — Comp. John 15:15. The statements are not opposed to each other. On His side there is the readiness to impart to them as friends all things that He had heard from the Father. But revelation can only be made to the mind which can accept it; and for those who have only in part understood what He has told them there are many things which cannot now be borne.
Of what the “many things” were, we have only this general knowledge. They would include, doubtless, the doctrinal system of the early Church, and they would not exclude all the lessons which the spirit of God has taught the Church in every age.
The fact that there were truths which Christ Himself could not teach is a lesson which men who profess to teach in Christ’s name have too seldom learnt. St. Paul found in it a rule for his own practice. He, too, fed men with milk because they could not bear meat. (Comp. Note on 1 Corinthians 3:3.) It is true, indeed, that no one can teach who does not possess a higher knowledge than that of his pupil; but it is no less true that no one can really teach who does not take the lower ground of his pupil’s knowledge, and from that lead him to his own. Truths which the cultured mind accepts as obvious would appear no less so to the peasant if he were carefully taught them. Too often the weaker brother finds a stumbling-block in the very steps which should lead him to a higher truth, because he approaches them blindly, and without a guide. For the breach which exists between the higher Christian thought of our day and the faith of the masses of the people, Christian teachers are in no small degree responsible, and the only means by which the chasm may be bridged is to teach Christ’s truths as He Himself taught them.