To spend life for something which outlasts it.

Our colleges ought to have lit up in us a lasting relish for a better kind of man, a loss of appetite for mediocrities.

Neither moral relations nor the moral law can swing in vacuo. Their only habitat can be a mind which feels them; and no world composed of merely physical facts can possibly be a world to which ethical propositions apply.

The ideas gained by men before they are twenty-five are practically the only ideas they shall have in their lives.

In order to disprove the assertion that all crows are black, one white crow is sufficient.

An idea will infect another with its own emotional interest when they have become both associated together into any sort of a mental total.

Common sense and a sense of humor are the same thing, moving at different speeds. A sense of humor is just common sense, dancing.