The point about zero is that we do not need to use it in the operation of daily life. No one goes out to buy zero fish.

Great people plant trees they'll never sit under.

There is no greater hindrance to the progress of thought than an attitude of irritated party-spirit.

Religion is what the individual does with his own solitariness. Thus religion is solitariness; and if you are never solitary, you are never religious.

Each generation criticizes the unconscious assumptions made by its parent. It may assent to them, but it brings them out in the open.

There is no more common error than to assume that, because prolonged and accurate mathematical calculations have been made, the application of the result to some fact of nature is absolutely certain.

The result of teaching small parts of a large number of subjects is the passive reception of disconnected ideas, not illumed with any spark of vitality.