The point about zero is that we do not need to use it in the operations of daily life. No one goes out to buy zero fish. It is in a way the most civilised of all the cardinals, and its use is only forced on us by the needs of cultivated modes of thought.

Art flourishes where there is a sense of adventure.

We must produce a great age, or see the collapse of the upward striving of our race.

Every really new idea looks crazy at first.

Science repudiates philosophy. In other words, it has never cared to justify its truth or explain its meaning.

Problems are only opportunities in disquise.

If a dog jumps into your lap, it is because he is fond of you; but if a cat does the same thing, it is because your lap is warmer.