He is not a true man of science who does not bring some sympathy to his studies, and expect to learn something by behavior as well as by application. It is childish to rest in the discovery of mere coincidences, or of partial and extraneous laws. The study of geometry is a petty and idle exercise of the mind, if it is applied to no larger system than the starry one. Mathematics should be mixed not only with physics but with ethics; that is mixed mathematics. The fact which interests us most is the life of the naturalist. The purest science is still biographical.
Henry David ThoreauAlways the laws of light are the same, but the modes and degrees of seeing vary.
Henry David ThoreauThere may be an excess of cultivation as well as of anything else, until civilization becomes pathetic. A highly cultivated man,--all whose bones can be bent! whose heaven-born virtues are but good manners!
Henry David ThoreauWhat youth or maiden conspires with the wild luxuriant beauty of Nature? She flourishes most alone, far from the towns where they reside.
Henry David ThoreauIt is a thorough process, this war with the wilderness - breaking nature, taming the soil. feeding it on oats. The civilized man regards the pine tree as his enemy. He will fell it and let in the light, grub it up and raise wheat or rye there. It is no better than a fungus to him.
Henry David Thoreau