The difference between men is in their principle of association. Some men classify objects by color and size and other accidents of appearance; others by intrinsic likeness, or by the relation of cause and effect. The progress of the intellect is to the clearer vision of causes, which neglects surface differences. To the poet, to the philosopher, to the saint, all things are friendly and sacred, all events profitable, all days holy, all men divine. For the eye is fastened on the life, and slights the circumstance. Every chemical substance, every plant, every animal in its growth, teaches the unity of cause, the variety of appearance.
Upborne and surrounded as we are by this all-creating nature, soft and fluid as a cloud or the air, why should we be such hard pedants, and magnify a few forms? Why should we make account of time, or of magnitude, or of figure? The soul knows them not, and genius, obeying its law, knows how to play with them as a young child plays with graybeards and in churches. Genius studies the causal thought, and, far back in the womb of things, sees the rays parting from one orb, that diverge ere they fall by infinite diameters. Genius watches the monad through all his masks as he performs the metempsychosis of nature. Genius detects through the fly, through the caterpillar, through the grub, through the egg, the constant individual; through countless individuals, the fixed species; through many species, the genus; through all genera, the steadfast type; through all the kingdoms of organized life, the eternal unity. Nature is a mutable cloud, which is always and never the same. She casts the same thought into troops of forms, as a poet makes twenty fables with one moral. Through the bruteness and toughness of matter, a subtle spirit bends all things to its own will. The adamant streams into soft but precise form before it, and, whilst I look at it, its outline and texture are changed again. Nothing is so fleeting as form; yet never does it quite deny itself. In man we still trace the remains or hints of all that we esteem badges of servitude in the lower races; yet in him they enhance his nobleness and grace; as Io, in Aeschylus, transformed to a cow, offends the imagination; but how changed, when as Isis in Egypt she meets Osiris-Jove, a beautiful woman, with nothing of the metamorphosis left but the lunar horns as the splendid ornament of her brows!
– Ralph Waldo Emerson (American philosopher, 1803-1882), from his essay "History" (1841).
[daily log: walking, 3 km]