We delude ourselves if we believe that skilled behavior is easy, that it can come about without effort. We forget the years of tuning, of learning and practice it takes to be skilled at even the most fundamental of human activities: eating, walking, talking, reading, and writing. It is tempting to want instant gratification - immediate expert performance and experiential pleasure - but the truth is that this primarily occurs only after considerable amounts of accretion and tuning.

I think there is a tendency in science to measure what is measurable and to decide that what you cannot measure must be uninteresting.

Only the most sophisticated of beings can lie and cheat, and get away with it.

A challenge to the designers of the world: Make signs unnecessary.

In the university, professors make up artificial problems. In the real world, the problems do not come in nice, neat packages. They have to be discovered.

Everyday people are not very good designers.

In my opinion, no single design is apt to be optimal for everyone.