This soldier, I realized, must have had friends at home and in his regiment; yet he lay there deserted by all except his dog. I looked on, unmoved, at battles which decided the future of nations. Tearless, I had given orders which brought death to thousands. Yet here I was stirred, profoundly stirred, stirred to tears. And by what? By the grief of one dog.

You can fool all the people some of the time, and some of the people all the time, but you cannot fool all the people all the time.

Nature appears to have been the cruel stepmother rather than the mother of many animals.

Intelligence is based on how efficient a species became at doing the things they need to survive.

A bird as it rises always sets its wings above the wind and without beating them, and it always moves in a circular movement.

It doesn't make sense to hire smart people and tell them what to do; we hire smart people so they can tell us what to do.