We cannot set up, out of our heads, something we regard as an ideal society.

The moment philosophy supposes it can find a final and comprehensive solution, it ceases to be inquiry and becomes either apologetics or propaganda.

Every great advance in science has issued from a new audacity of imagination. What are now working conceptions, employed as a matter of course because they have withstood the tests of experiment and have emerged triumphant, were once speculative hypotheses.

All genuine education comes about through experience.

In brief, the function of knowledge is to make one experience freely available to other experiences.

If humanity has made some headway in realizing that the ultimate value of every institution is its distinctively human effect - its effect upon conscious experience - we may well believe that this lesson has been learned largely through dealings with the young.

The school must be "a genuine form of active community life, instead of a place set apart in which to learn lessons".