Intelligence is what you use when you don't know what to do: when neither innateness nor learning has prepared you for the particular situation.

The main functions of intelligence, that of inventing solutions and that of verifying them, do not necessarily involve one another. The first partakes of imagination; the second alone is properly logical.

The current state of knowledge is a moment in history, changing just as rapidly as the state of knowledge in the past has ever changed and, in many instances, more rapidly.

The principle goal of education in the schools should be creating men and women who are capable of doing new things, not simply repeating what other generations have done.