Experience alone cannot deliver to us necessary truths; truths completely demonstrated by reason. Its conclusions are particular, not universal.

Mere physical growing up, mere mastery of the bare necessities of subsistence will not suffice to reproduce the life of the group. Deliberate effort and the taking of thoughtful pains are required.

Cooperation called fraternity in the classic French formula is as much a part of the democratic ideal as is personal initiative. That cultural conditions were allowed to develop (markedly so in the economic phase) which subordinated cooperativeness to liberty and equality serves to explain the decline in the two latter.

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.

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

Mind is a verb not a noun.

Thought is impossible without words.