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.

The gods are partial to no era, but steadily shines their light in the heavens, while the eye of the beholder is turned to stone.There was but the sun and the eye from the first. The ages have not added a new ray to the one, nor altered a fibre of the other.

It is the man determines what is said, not the words.

Your religion is where your love is.

It is possible to invent a house still more convenient and luxurious than we have...but shall we always study to obtain more of these things, and not sometimes to be content with less?

We cannot see anything until we are possessed with the idea of it, take it into our heads,--and then we can hardly see anything else.

What a battle a man must fight everywhere to maintain his standing army of thoughts, and march with them in orderly array throughthe always hostile country! How many enemies there are to sane thinking! Every soldier has succumbed to them before he enlists for those other battles.