This human mind wrote history, and this must read it. The Sphinx must solve her own riddle. If the whole of history is in one man, it is all to be explained from individual experience. There is a relation between the hours of our life and the centuries of time. As the air I breathe is drawn from the great repositories of nature, as the light on my book is yielded by a star a hundred millions of miles distant, as the poise of my body depends on the equilibrium of centrifugal and centripetal forces, so the hours should be instructed by the ages and the ages explained by the hours. Of the universal mind each individual man is one more incarnation. All its properties consist in him. Each new fact in his private experience flashes a light on what great bodies of men have done, and the crises of his life refer to national crises. Every revolution was first a thought in one man’s mind, and when the same thought occurs to another man, it is the key to that era. Every reform was once a private opinion, and when it shall be a private opinion again it will solve the problem of the age. The fact narrated must correspond to something in me to be credible or intelligible. We, as we read, must become Greeks, Romans, Turks, priest and king, martyr and executioner; must fasten these images to some reality in our secret experience, or we shall learn nothing rightly. What befell Asdrubal or Cæsar Borgia is as much an illustration of the mind’s powers and depravations as what has befallen us. Each new law and political movement has meaning for you. Stand before each of its tablets and say, ‘Under this mask did my Proteus nature hide itself.’ This remedies the defect of our too great nearness to ourselves. This throws our actions into perspective; and as crabs, goats, scorpions, the balance and the waterpot lose their meanness when hung as signs in the zodiac, so I can see my own vices without heat in the distant persons of Solomon, Alcibiades, and Catiline.