The generous youths who came to manhood between 1820 and 1830, while this deadly era was maturing, seem to have undergone a revulsion against the world almost before touching it; at least two of them suffered, revolted, and condemned, while still boys sitting on benches in school, and came forth advancing upon this old society like gladiators. The activity of William Lloyd Garrison, the man of action, preceded by several years that of Emerson, who is his prophet. Both of them were parts of one revolution. One of Emerson's articles of faith was that a man's thoughts spring from his actions rather than his actions from his thoughts, and possibly the same thing holds good for society at large. Perhaps all truths, whether moral or economic, must be worked out in real life before they are discovered by the student, and it was therefore necessary that Garrison should be evolved earlier than Emerson. The silent years of early manhood, during which Emerson passed through the Divinity School and to his ministry, known by few, understood by none, least of all by himself, were years in which the revolting spirit of an archangel thought out his creed. He came forth perfect, with that serenity of which we have scarce another example in history,--that union of the man himself, his beliefs, and his vehicle of expression that makes men great because it makes them comprehensible. The philosophy into which he had already transmuted all his earlier theology at the time we first meet him consisted of a very simple drawing together of a few ideas, all of which had long been familiar to the world. It is the wonderful use he made of these ideas, the closeness with which they fitted his soul, the tact with which he took what he needed, like a bird building its nest, that make the originality, the man. The conclusion of Berkeley, that the external world is known to us only through our impressions, and that therefore, for aught we know, the whole universe exists only in our own consciousness, cannot be disproved. It is so simple a conception that a child may understand it; and it has probably been passed before the attention of every thinking man since Plato's time. The notion is in itself a mere philosophical catch or crux to which there is no answer. It may be true. The mystics made this doctrine useful. They were not content to doubt the independent existence of the external world. They imagined that this external world, the earth, the planets, the phenomena of nature, bore some relation to the emotions and destiny of the soul. The soul and the cosmos were somehow related, and related so intimately that the cosmos might be regarded as a sort of projection or diagram of the soul.