I envy no quality of the mind or intellect in others; not genius, power, wit, nor fancy; but, if I could choose what would be most delightful, and, I believe, most useful to me, I should prefer a firm religious belief to every other blessing.

Nothing tends so much to the advancement of knowledge as the application of a new instrument.

It must always be borne in mind that the assumption of woman's social superiority lies at the root of these rules of conduct.

The three states of the caterpillar, larva, and butterfly have, since the time of the Greek poets, been applied to typify the human being,--its terrestrial form, apparent death, and ultimate celestial destination.

When two elements combine and form more than one compound, the masses of one element that react with a fixed mass of the other are in the ratio of small whole numbers.

The ideal life is that which has few friends, but many acquaintances.

Fortunately science, like that nature to which it belongs, is neither limited by time nor by space. It belongs to the world, and is of no country and no age. The more we know, the more we feel our ignorance; the more we feel how much remains unknown.