Children are the living messages we send to a time we will not see. From a biological point of view it is inconceivable that any culture will forget that it needs to reproduce itself. But it is quite possible for a culture to exist without a social idea of children. Unlike infancy, childhood is a social artifact, not a biological category.

The past is strapped to our backs. We do not have to see it; we can always feel it. People gather bundles of sticks to build bridges they never cross. People in distress will sometimes prefer a problem that is familiar to a solution that is not.

We can make the trains run on time but if they are not going where we want them to go, why bother?

A definition is the start of an argument, not the end of one.

Our priests and presidents, our surgeons and lawyers, our educators and newscasters need worry less about satisfying the demands of their discipline than the demands of good showmanship.

There is no way to help a learner to be disciplined, active, and thoroughly engaged unless he perceives a problem to be a problem or whatever is to-be-learned as worth learning, and unless he plays an active role in determining the process of solution.

People of a television culture need “plain language” both aurally and visually, and will even go so far as to require it in some circumstances by law. The Gettysburg Address would probably have been largely incomprehensible to a 1985 audience.