If we teach today’s students as we taught yesterday’s, we rob them of tomorrow.

There is no greater egoism than that of learning when it is treated simply as a mark of personal distinction to be held and cherished for its own sake. ... [K]knowledge is a possession held in trust for the furthering of the well-being of all

The phrase "think for one's self" is a pleonasm. Unless one does it for one's self, it isn't thinking.

Society not only continues to exist by transmission, by communication, but it may fairly be said to exist in transmission, in communication.

Politics is the shadow cast on society by big business.

Every one has experienced how learning an appropriate name for what was dim and vague cleared up and crystallized the whole matter. Some meaning seems distinct almost within reach, but is elusive; it refuses to condense into definite form; the attaching of a word somehow (just how, it is almost impossible to say) puts limits around the meaning, draws it out from the void, makes it stand out as an entity on its own account.

A large part of the art of instruction lies in making the difficulty of new problems large enough to challenge thought, and small enough so that, in addition to the confusion naturally attending the novel elements, there shall be luminous familiar spots from which helpful suggestions may spring.