Scientific principles and laws do not lie on the surface of nature. They are hidden, and must be wrested from nature by an active and elaborate technique of inquiry.

The need for growth, for development, for change, is fundamental to life.

To pull at a rope at which others happen to be pulling is not a shared or conjoint activity, unless the pulling is done with knowledge that others are pulling and for the sake of either helping or hindering what they are doing.

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.

Beings who are born not only unaware of, but quite indifferent to, the aims and habits of the social group have to be rendered cognizant of them and actively interested. Education, and education alone, spans the gap.

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.

Schools have ignored the value of experience and chosen to teach by pouring in.