We can understand almost anything, but we can't understand how we understand.

The important thing is to never stop questioning. Never lose a holy curiosity.

The indifference, callousness and contempt that so many people exhibit toward animals is evil first because it results in great suffering in animals, and second because it results in an incalculably great impoverishment of the human spirit.

But the personality that finally emerges is largely formed by the environment in which a man happens to find himself during his development, by the structure of the society in which he grows up, by the tradition of that society, and by its appraisal of particular types of behavior.

One cannot learn so well as by experiencing it oneself.

Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either.

The chicken did not cross the road. The road passed beneath the chicken.