Something unknown is doing we don't know what-that is what our theory amounts to.

The quest of the absolute leads into the four-dimensional world.

So far as physics is concerned, time's arrow is a property of entropy alone.

If an army of monkeys were strumming on typewriters, they might write all the books in the British Museum.

It is also a good rule not to put overmuch confidence in the observational results that are put forward until they are confirmed by theory.

Probably the simplest hypothesis... is that there may be a slow process of annihilation of matter.

Let us suppose that an ichthyologist is exploring the life of the ocean. He casts a net into the water and brings up a fishy assortment. Surveying his catch, he proceeds in the usual manner of a scientist to systematise what it reveals. He arrives at two generalisations: No sea-creature is less than two inches long. (2) All sea-creatures have gills. These are both true of his catch, and he assumes tentatively that they will remain true however often he repeats it.