We are infected by our own misunderstanding of how...

The great advance of personal computers was not the computing power per se but the fact that it brought it right to your face, that you had control over it, that were confronted with it and could steer it.

Organisms by their design are not made to adapt too far.

Species go extinct because there are historical contraints built into a given body or a given design.

Youth is the gift of nature, but age is a work of art.

It is utterly false and cruelly arbitrary to put all the play and learning into childhood, all the work into middle age, and all the regrets into old age.

Old age is not a matter for sorrow. It is matter for thanks if we have left our work done behind us.

Have regular hours for work and play make each day both useful and pleasant, and prove that you understand the worth of time by employing it well. Then youth will be delightful, old age will bring few regrets, and life will become a beautiful success.