Remember, in the first place, that the Vine was the Eastern symbol of Joy. It was its fruit that made glad the heart of man. Yet, however innocent that gladness--for the expressed juice of the grape was the common drink at every peasant's board--the gladness was only a gross and passing thing. This was not true happiness, and the vine of the Palestine vineyards was not the true vine. "_Christ_ was the _true_ Vine." Here, then, is the ultimate source of Joy. Through whatever media it reaches us, all true Joy and Gladness find their source in Christ. By this, of course, is not meant that the actual Joy experienced is transferred from Christ's nature, or is something passed on from Him to us. What is passed on is His method of getting it. There is, indeed, a sense in which we can share another's joy or another's sorrow. But that is another matter. Christ is the source of Joy to men in the sense in which He is the source of Rest. His people share His life, and therefore share its consequences, and one of these is Joy. His method of living is one that in the nature of things produces Joy. When He spoke of His Joy remaining with us He meant in part that the causes which produced it should continue to act. His followers, (that is to say), by _repeating_ His life would experience its accompaniments. His Joy, His kind of Joy, would remain with them. The medium through which this Joy comes is next explained: "He that abideth in Me, the same bringeth forth much fruit." Fruit first, Joy next; the one the cause or medium of the other. Fruit-bearing is the necessary antecedent; Joy both the necessary consequent and the necessary accompaniment. It lay partly in the bearing fruit, partly in the fellowship which made that possible. Partly, that is to say, Joy lay in mere constant living in Christ's presence, with all that that implied of peace, of shelter, and of love; partly in the influence of that Life upon mind and character and will; and partly in the inspiration to live and work for others, with all that that brought of self-riddance and joy in others' gain. All these, in different ways and at different times, are SOURCES OF PURE HAPPINESS. Even the simplest of them--to do good to other people--is an instant and infallible specific. There is no mystery about Happiness whatever. Put in the right ingredients and it must come out. He that abideth in Him will bring forth much fruit; and bringing forth much fruit is Happiness. The infallible receipt for Happiness, then, is to do good; and the infallible receipt for doing good is to abide in Christ. The surest proof that all this is a plain matter of Cause and Effect is that men may try every other conceivable way of finding happiness, and they will fail. Only the right cause in each case can produce the right effect.