I do what I feel impelled to do, as an artist would. Scientists function in the same way. I see all these as creative activities, as all part of the process of discovery. Perhaps that's one of the characteristics of what I call the evolvers, any subset of the population who keep things moving in a positive, creative, constructive way, revealing the truth and beauty that exists in life and in nature.

One of the greatest rewards for doing can be the chances it gives to do some more - even better.

A good parent gives their child roots and wings.

Your dreams tell you what to do; your reason tells you how to do it.

It is courage based on confidence, not daring, and it is confidence based on experience.

Our greatest responsibility is to be good ancestors.

What people think of as the moment of discovery is really the discovery of the question.