Jesus adds two similes, which are condensed parables, to deal with a wider question rising out of the preceding principles. The difference between His disciples' religious demeanour and that of their critics is not merely that the former are not now in a mood for fasting, but that a new spirit is beginning to work in them, and therefore it will go hard with a good many old forms besides fasting.
The essential point in both the similes of the raw cloth stitched on to the old, and of the new wine poured into stiff old skins, is the necessary incongruity between old forms and new tendencies. Undressed cloth is sure to shrink when wetted, and, being stronger than the old, to draw its frayed edges away. So, if new truth, or new conceptions of old truth, or new enthusiasms, are patched on to old modes, they will look out of place, and will sooner or later rend the old cloth. But the second simile advances on the first, in that it points not only to harm done to the old by the unnatural marriage, but also to mischief to the new. Put fermenting wine into a hard, unyielding, old wine-skin, and there can be but one result, the strong effervescence will burst the skin, which may not matter much, and the precious wine will run out and be lost, sucked up by the thirsty soil, which matters more. The attempt to confine the new within the limits of the old, or to express it by the old forms, destroys them and wastes it. The attempt was made to keep Christianity within the limits of Judaism; it failed, but not before much harm had been done to Christianity. Over and over again the effort has been made in the Church, and it has always ended disastrously,--and it always will. It will be a happy day for both the old and the new when we all learn to put new wine into new skins, and remember that God giveth it a body as it hath pleased Him, and to every seed his own body.'