Learning results from what the student does and thinks, and only from what the student does and thinks. The teacher can advance learning only by influencing the student to learn.

Solving a problem simply means representing it so as to make the solution transparent.

Enlightenments, like accidents, happen only to prepared minds.

Most of what we do to get people ready to act in situations of encounter consists of drilling these lists into them sufficiently deeply so that they will be evoked quickly at the time of the decision.

Everyone designs who devises courses of action aimed at changing existing situations into preferred ones.

Technology may create a condition, but the questions are what do we do about ourselves. We better understand ourselves pretty clearly and we better find ways to like ourselves

The social sciences, I thought, needed the same kind of rigor and the same mathematical underpinnings that had made the 'hard' sciences so brilliantly successful.