It is our duty still to endeavor to avoid war but if it shall actually take place no matter by whom brought on we must defend ourselves. If our house be on fire without inquiring whether it was fired from within or without we must try to extinguish it.

The mark of a truly civilized man is confidence in the strength and security derived from the inquiring mind.

Science is always inquiring.

So long as I can stay mentally alert - inquiring curious - I want to keep going. I love my wife and my children but I don't want to sit around at home with them. We go on safaris and things like that. I can do that for a couple of weeks a year. I'm just not ready to stop to die.