a problem well put is half solved.

We have already noticed the difference in the attitude of a spectator and of an agent or participant. The former is indifferent to what is going on; one result is just as good as another, since each is just something to look at. The latter is bound up with what is going on; its outcome makes a difference to him.

Give the pupils something to do, not something to learn; and the doing is of such a nature as to demand thinking; learning naturally results.

As some species die out, forms better adapted to utilize the obstacles against which they struggled in vain come into being.

To be born, to live and to die is merely to change forms... And what does one form matter any more than another?... Each form has its own sort of happiness and unhappiness. From the elephant down to the flea... from the flea down to the sensitive and living molecule which is the origin of all, there is not a speck in the whole of nature that does not feel pain or pleasure.

We rarely recognize the extent in which our conscious estimates of what is worth while and what is not, are due to standards of which we are not conscious at all.

Understanding one another means that objects, including sounds, have the same value for both with respect to carrying on a common pursuit.