The greatest educational dogma is also its greatest fallacy: the belief that what must be learned can necessarily be taught.

Sometimes the best, and only effective, way to kill an idea is to put it into practice.

It's surprising how many persons go through life without ever recognizing that their feelings toward other people are largely determined by their feelings toward themselves, and if you're not comfortable within yourself, you can't be comfortable with others.

Patriotism is proud of a country's virtues and eager to correct its deficiencies; it also acknowledges the legitimate patriotism of other countries, with their own specific virtues. The pride of nationalism, however, trumpets its country's virtues and denies its deficiencies, while it is contemptuous toward the virtues of other countries. It wants to be, and proclaims itself to be, "the greatest," but greatness is not required of a country; only goodness is.

Ancient boundaries are meaningless, except for political purposes; old divisions of clan and tribe are sentimental remnants of the pre-atomic age; neither creed nor color nor place of origin is relevant to the realities of modern power to utterly seek and destroy.

Every rule in the book can be broken, except one - be who you are, and become all you were meant to be.

The three hardest tasks in the world are neither physical feats nor intellectual achievements, but moral acts: to return love for hate, to include the excluded, and to say, 'I was wrong'.