A cold and searching wind drives away all contagion, and nothing can withstand it but what has a virtue in it, and accordingly, whatever we meet with in cold and bleak places, as the tops of mountains, we respect for a sort of sturdy innocence, a Puritan toughness. All things beside seem to be called in for shelter, and what stays out must be part of the original frame of the universe, and of such valor as God himself.
Henry David ThoreauI believe that it is in my power to elevate myself this very hour above the common level of my life.
Henry David ThoreauWhat is called common sense is excellent in its department, and as invaluable as the virtue of conformity in the army and navy,--for there must be subordination,--but uncommon sense, that sense which is common only to the wisest, is as much more excellent as it is more rare.
Henry David ThoreauHe 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 Thoreau