An impression which simply flows in at the pupil's eyes or ears and in no way modifies his active life, is an impression gone to waste. It is physiologically incomplete... Its motor consequences are what clinch it.

To give the theory plenty of 'rope' and see if it hangs itself eventually is better tactics than to choke it off at the outset b abstract accusations of self-contradiction

Most people never run far enough on their first wind to find out they've got a second.

Success or failure depends more upon attitude than upon capacity.

Pessimism leads to weakness. Optimism leads to power.

We have lost the power even of imagining what the ancient idealization of poverty could have meant: the liberation from material attachments, the unbribed soul, the manlier indifference, the paying our way by what we are and not by what we have, the right to fling away our life at any moment irresponsibly - the more athletic trim, in short, the moral fighting shape.

Faith means belief in something concerning which doubt is theoretically possible.