Beware when the great God lets loose a thinker on this planet. Then all things are at risk. It is as when a conflagration has broken out in a great city, and no man knows what is safe, or where it will end. There is not a piece of science but its flank may be turned to-morrow; there is not any literary reputation, not the so-called eternal names of fame, that may not be revised and condemned. The very hopes of man, the thoughts of his heart, the religion of nations, the manners and morals of mankind are all at the mercy of a new generalization. Generalization is always a new influx of the divinity into the mind. Hence the thrill that attends it.

Valor consists in the power of self-recovery, so that a man cannot have his flank turned, cannot be out-generalled, but put him where you will, he stands. This can only be by his preferring truth to his past apprehension of truth, and his alert acceptance of it from whatever quarter; the intrepid conviction that his laws, his relations to society, his Christianity, his world, may at any time be superseded and decease.

There are degrees in idealism. We learn first to play with it academically, as the magnet was once a toy. Then we see in the heyday of youth and poetry that it may be true, that it is true in gleams and fragments. Then its countenance waxes stern and grand, and we see that it must be true. It now shows itself ethical and practical. We learn that God IS; that he is in me; and that all things are shadows of him. The idealism of Berkeley is only a crude statement of the idealism of Jesus, and that again is a crude statement of the fact that all nature is the rapid efflux of goodness executing and organizing itself. Much more obviously is history and the state of the world at any one time directly dependent on the intellectual classification then existing in the minds of men. The things which are dear to men at this hour are so on account of the ideas which have emerged on their mental horizon, and which cause the present order of things, as a tree bears its apples. A new degree of culture would instantly revolutionize the entire system of human pursuits.