I am aware there are those who fancy that science itself is sufficient guide and equipment for human existence. Huxley, if I remember rightly, asserted in his nonage that science would even afford us a newer and more enlightened morality. But I have never heard any scientist repeat that doctrine; I have never heard any scientist claim that the altruism of the Sermon on the Mount or of Buddha had been superseded by the dry light of scientific conclusions. Physical science and its inventions have not obviously advanced the delicacy of sentiments or of ethical ideas. Chaucer's notion of a "parfit gentil knight," and his "poure parsoun of a toun" could not be bettered for anything discovered in all the five centuries since. It is not easy to see how science can stimulate us to warm-hearted charity, to self-sacrificing love and loyalty, to patriotism, and other manifestations of qualities which we universally recognize as virtues, and as things without which human life would be a dreary and intolerable waste. Without them suicide were almost best. And the cultivation of the emotions belongs to literature, not to objective science. Will you pardon me if I repeat an illustration which has been used before, though I forget where? There are two ways of regarding tears. They may be the infinitely appealing outward and visible signs of some great inward troubling of the spirit. They may "rise in the heart and gather to the eyes" from "the depths of some divine despair." On the other hand they may be what they were to a certain character in Balzac. The physicist Baltazar retorts in answer to an outburst of tears, "Ah! tears! I have analysed them; they contain a little phosphate of lime, chloride of sodium, mucin, and water!" I do not happen to know if that is a correct analysis, but I do know that both these aspects of tears are true aspects. There is nothing contradictory about them. The one is the aspect of objective science; the other--the human and moral aspect--is that of literature. Is there any doubt which aspect ultimately concerns us the more as human beings, livers of human lives? There is no conflict between science and literature, especially between science and poetry.