What strength belongs to every plant and animal in nature. The tree or the brook has no duplicity, no pretentiousness, no show. It is, with all its might and main, what it is, and makes one and the same impression and effect at all times. All the thoughts of a turtle are turtles, and of a rabbit, rabbits. But a man is broken and dissipated by the giddiness of his will ; he does not throw himself into his judgments; his genius leads him one way but 't is likely his trade or politics in quite another.

The Natural History of Intellect (1893).