Those obsessed with health are not healthy; the first requisite of good health is a certain calculated carelessness about oneself.

At it's highest level, the purpose of teaching is not to teach—it is to inspire the desire for learning. Once a student's mind is set on fire, it will find a way to provide its own fuel.

The two words 'information' and 'communication' are often used interchangeably, but they signify quite different things. Information is giving out; communication is getting through.

The art of listening needs its highest development in listening to oneself; our most important task is to develop an ear that can really hear what we're saying.

But what is significant is that if you don't want to like and accept somebody, one excuse is as good as another. The objective facts don't matter, and the reasons are never as ‘reasonable' as we like to think they are.

The paradox of friendship is that it is both the strongest thing in the world and the most fragile. Wild horses cannot separate friends, but whining words can. A man will lay down his life for his friend but will not sacrifice his eardrums.

The difference between faith and superstition is that the first uses reason to go as far as it can, and then makes the jump; the second shuns reason entirely — which is why superstition is not the ally, but the enemy, of true religion.