I would feel more optimistic about a bright future for man if he spent less time proving that he can outwit Nature and more time tasting her sweetness and respecting her seniority.

Examinations are formidable even to the best prepared, for the greatest fool may ask more than the wisest man can answer.

Genius without education is like silver in the mine.

People often say that humans have always eaten animals, as if this is a justification for continuing the practice. According to this logic, we should not try to prevent people from murdering other people, since this has also been done since the earliest of times.

Kindness and compassion toward all living things is a mark of a civilized society. Conversely, cruelty, whether it is directed against human beings or against animals, is not the exclusive province of any one culture or community of people. Racism, economic deprival, dog fighting and cock fighting, bull fighting and rodeos are cut from the same fabric: violence. Only when we have become nonviolent toward all life will we have learned to live well ourselves.

You wake me up early in the morning to tell me I am right? Please wait until I am wrong.

We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

Every person takes the limits of their own field of vision for the limits of the world.

Science may set limits to knowledge, but should not set limits to imagination.

No matter how much the cats fight, there always seem to be plenty of kittens.