"To that cathedral, boundless as our wonder, Whose quenchless lamps the sun and moon supply; Its choir the winds and waves, its organ thunder, Its dome the sky." [3] Where the untrained eye will see nothing but mire and dirt, Science will often reveal exquisite possibilities. The mud we tread under our feet in the street is a grimy mixture of clay and sand, soot and water. Separate the sand, however, as Ruskin observes--let the atoms arrange themselves in peace according to their nature--and you have the opal. Separate the clay, and it becomes a white earth, fit for the finest porcelain; or if it still further purifies itself, you have a sapphire. Take the soot, and if properly treated it will give you a diamond. While, lastly, the water, purified and distilled, will become a dew-drop, or crystallize into a lovely star. Or, again, you may see as you will in any shallow pool either the mud lying at the bottom, or the image of the heavens above. Nay, even if we imagine beauties and charms which do not really exist; still if we err at all it is better to do so on the side of charity; like Nasmyth, who tells us in his delightful autobiography, that he used to think one of his friends had a charming and kindly twinkle, and was one day surprised to discover that he had a glass eye. But I should err indeed were I to dwell exclusively on science as lending interest and charm to our leisure hours. Far from this, it would be impossible to overrate the importance of scientific training on the wise conduct of life. "Science," said the Royal Commission of 1861, "quickens and cultivates directly the faculty of observation, which in very many persons lies almost dormant through life, the power of accurate and rapid generalization, and the mental habit of method and arrangement; it accustoms young persons to trace the sequence of cause and effect; it familiarizes them with a kind of reasoning which interests them, and which they can promptly comprehend; and it is perhaps the best corrective for that indolence which is the vice of half-awakened minds, and which shrinks from any exertion that is not, like an effort of memory, merely mechanical." Again, when we contemplate the grandeur of science, if we transport ourselves in imagination back into primeval times, or away into the immensity of space, our little troubles and sorrows seem to shrink into insignificance. "Ah, beautiful creations!" says Helps, speaking of the stars, "it is not in guiding us over the seas of our little planet, but out of the dark waters of our own perturbed minds, that we may make to ourselves the most of your significance." They teach, he tells us elsewhere, "something significant to all of us; and each man has a whole hemisphere of them, if he will but look up, to counsel and befriend him."