I believe that education is the fundamental method of social progress and reform.

It science involves an intelligent and persistent endeavor to revise current beliefs so as to weed out what is erroneous, to add to their accuracy, and, above all, to give them such shape that the dependencies of the various facts upon one another may be as obvious as possible.

There is no such thing as educational value in the abstract. The notion that some subjects and methods and that acquaintance with certain facts and truths possess educational value in and of themselves is the reason why traditional education reduced the material of education so largely to a diet of predigested materials.

Continuity of life means continual readaptation of the environment to the needs of living organisms.

How many students ... were rendered callous to ideas, and how many lost the impetus to learn because of the way in which learning was experienced by them?

Nature is the mother and the habitat of man, even if sometimes a stepmother and an unfriendly home.

The ultimate aim of production is not production of goods but the production of free human beings associated with one another on terms of equality.