Under the one word "house" are included the schoolhouse, the almshouse, the jail, the tavern, the dwellinghouse; and the meanest shed or cave in which men live contains elements of all these. But nowhere on the earth stands the entire and perfect house.

The soul grows by subtraction, not addition.

We are the subjects of an experiment which is not a little interesting to me.

When a dog runs at you, whistle for him.

There must be some nerve and heroism in our love, as of a winter morning.

If you're familiar with a principle you don't have to be familiar with all of its applications.

He is not a true man of science who does not bring some sympathy to his studies, and expect to learn something by behaviour as well as application.