As all colors are potentially contained in the pure white light, and as the composition of all colors produces the pure white light, so the teachings of Jesus contain in principle all the forms of ethical truth that were ever in the minds of men. But here the analogy fails. All the ethical truth that all others have taught when brought together fails to make the sum total of his teachings; some colors are lacking in them; together they do not make the pure white light of the gospels. CHAPTER XV. WHAT HE CLAIMS AND DEMANDS. There is a fact, personal to Jesus, that not only enters vitally into this argument, but more than any thing else explains the power of his words on the conscience: what was considered in another relation in the outset--the perfection of his own character; his sinlessness: his absolute purity. A perfect doctrine will no doubt affect the conscience, but a perfect doctrine uttered by one who lives a holy life has tenfold the power of the mere statement of doctrine. And it is not simply that the hearer recoils from a doctrine stated by an inconsistent or insincere man because he is inconsistent and insincere, but such a man cannot so much as utter the truth in its fullness; he cannot conceive the truth in its completeness. When Jesus utters a truth it lays hold upon the conscience and life not simply because it is the truth, but because he is the “Truth and the Life.” His conscience goes with the word and it enters into our conscience. It was this quality in him, more than aught else, that led his hearers, when the Sermon on the Mount was ended, to “wonder at his doctrine, for he taught them as one having authority.” It is living a truth more than learning about a truth that gives the teacher authority. An illustrative incident may help us here. The late Mr. Wray was a Baptist missionary in India. He was a man of known consistency of religious character. A child who knew him well was asked the question: “What is holiness?” A man would have done as so many do with lamentable failure, attempted a “definition;” the child answered: “Holiness is the way Mr. Wray lives.” The child was nearly, if not quite, at the bottom of the subject. The learner in the school of Jesus may find here a truth of first importance. It is twofold: 1. The best way to learn more truth is to live the truth he does know. 2. The only way to rightly teach any truth in morals, in things spiritual, is to live it. Religion, like science, believes in experiment and teaches by facts. The incarnate truth is the truth that has life in it. It is said with reverence, but with confidence, Jesus teaches what spiritual life is more by living it than by his words. His life expounds his doctrine, and without his life we could not understand his teachings.