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4 predominant, and the limits of nature give power to but one at a time. A man is the whole encyclopædia of facts. The creation of a thousand forests is in one acorn, and Egypt, Greece, Rome, Gaul, Britain, America, lie folded already in the first man. Epoch after epoch, camp, kingdom, empire, republic, democracy, are merely the application of his manifold spirit to the manifold world.

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. Every step 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