This is our Lord's last expansion, in these discourses, of the great promise of the Comforter which has appeared so often in them. First, He was spoken of simply as dwelling in Christ's servants, without any more special designation of His work than was involved in the name. Then, His aid was promised, to remind the Apostles of the facts of Christ's life, especially of His words; and so the inspiration and authority of the four Gospels were certified for us. Then He was further promised as the witness in the disciples to Jesus Christ. And, finally, in the immediately preceding context, we have His office of 'convincing,' or convicting, 'the world of sin, and of righteousness, and of judgment.' And now we come to that gracious and gentle work which that divine Spirit is declared by Christ to do, not only for that little group gathered round Him then, but for all those who trust themselves to His guidance. He is to be the 'Spirit of truth' to all the ages, who in simple verity will help true hearts to know and love the truth. There are three things in the words before us--first, the avowed incompleteness of Christ's own teaching; second, the completeness of the truth into which the Spirit of truth guides; and, last, the unity of these two. I. First, then, we have here the avowed incompleteness of Christ's own teaching. 'I have yet many things to say unto you, but ye cannot bear them now.' Now in an earlier portion of these great discourses, we have our Lord asserting that '_all_ things whatsoever He had heard of the Father He had made known' unto His servants. How do these two representations harmonise? Is it possible to make them agree? Surely, yes. There is a difference between the germ and the unfolded flower. There is a difference between principles and the complete development of these. I suppose you may say that all Euclid is in the axioms and definitions. I suppose you may also say that when you have learned the axioms and definitions, there are many things yet to be said, of which you have not grown to the apprehension. And so our Lord, as far as His frankness was concerned, and as far as the fundamental and seminal principles of all religious truth were concerned, had even then declared all that He had heard of the Father. But yet, in so far as the unfolding of these was concerned, the tracing of their consequences, the exhibition of their harmonies, the weaving of them into an ordered whole in which a man's understanding could lodge, there were many things yet to be said, which that handful of men were not able to bear. And so our Lord Himself here declares that His words spoken on earth are not His completed revelation.