Sanity is, in essence, nothing more than the ability to live in harmony with nature's laws. - Freeman Dyson

The ethical standards of scientists must change as the scope of the good and evil caused by science has changed. In the long run, as Haldane and Einstein said, ethical progress is the only cure for the damage done by scientific progress.

It is characteristic of all deep human problems that they are not to be approached without some humor and some bewilderment.

A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible.