Genuine ignorance is profitable because it is likely to be accompanied by humility, curiosity, and open-mindedness.

A problem well stated is a problem half solved.

For the highest task of intelligence is to grasp and recognize genuine opportunity, possibility.

The chief intellectual characteristic of the present age is its despair of any constructive philosophy.

Recreation, as the word indicates, is recuperation of energy. No demand of human nature is more urgent or less to be escaped.

Conflict is the gadfly of thought. It stirs us to observation and memory. It instigates to invention. It shocks us out of sheeplike passivity, and sets us at noting and contriving.

The theory of the method of knowing which is advanced in these pages may be termed pragmatic... Only that which has been organized into our disposition so as to enable us to adapt the environment to our needs and adapt our aims and desires to the situation in which we live is really knowledge.

Skepticism, the mark and even the pose of the educated mind.

Skeptics are generally ready to believe anything, provided is it only sufficiently improbable; it is at matters of fact that such people stumble.

If we teach today's students as we taught yesterday's, we rob them of tomorrow.