a man does not cry because he is sad, he is sad because he cries
Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.
We do not sing because we are happy, we are happy because we sing.
The greatest empiricists among us are only empiricists on reflection: when left to their instincts, they dogmatize like infallible popes.
Philosophy is "an unusually stubborn attempt to think clearly.
Need and struggle are what excite and inspire us; our hour of triumph is what brings the void.