Adventurous men enjoy shipwrecks, mutinies, earthquakes, conflagrations, and all kinds of unpleasant experiences. They say to themselves, for example, 'So this is what an earthquake is like,' and it gives them pleasure to have their knowledge of the world increased by this new item.

What we cannot think we cannot think, therefore we also cannot say what we cannot think.

For a good notation has a subtlety and suggestiveness which at times make it seem almost like a live teacher.

There are some simple maxims which I think might be commended to writers of expository prose. First: never use a long word if a short word will do. So, if you want to make a statement with a great many qualifications, put some of the qualifications in separate sentences. Third: do not let the beginning of your sentence lead the reader to an expectation which is contradicted by the end.

The taboo against nakedness is an obstacle to a decent attitude on the subject of sex.

Affection cannot be created; it can only be liberated.

Only mathematics and mathematical logic can say as little as the physicist means to say.