Most reading, I am convinced, is unphilosophical; that is to say, it lacks the element which more than anything else quickens the poetry of life. Unless and until a man has formed a scheme of knowledge, be it a mere skeleton, his reading must necessarily be unphilosophical. He must have attained to some notion of the inter-relations of the various branches of knowledge before he can properly comprehend the branch in which he specialises. If he has not drawn an outline map upon which he can fill in whatever knowledge comes to him, as it comes, and on which he can trace the affinity of every part with every other part, he is assuredly frittering away a large percentage of his efforts. There are certain philosophical works which, once they are mastered, seem to have performed an operation for cataract, so that he who was blind, having read them, henceforward sees cause and effect working in and out everywhere. To use another figure, they leave stamped on the brain a chart of the entire province of knowledge. Such a work is Spencer's _First Principles_. I know that it is nearly useless to advise people to read _First Principles_. They are intimidated by the sound of it; and it costs as much as a dress-circle seat at the theatre. But if they would, what brilliant stocktakings there might be in a few years! Why, if they would only read such detached essays as that on "Manners and Fashion," or "The Genesis of Science" (in a sixpenny volume of Spencer's _Essays_, published by Watts and Co.), the magic illumination, the necessary power of "synthetising" things, might be vouch-safed to them. In any case, the lack of some such disciplinary, co-ordinating measure will amply explain many disastrous stocktakings. The manner in which one single ray of light, one single precious hint, will clarify and energise the whole mental life of him who receives it, is among the most wonderful and heavenly of intellectual phenomena. Some men search for that light and never find it. But most men never search for it.