Arthur Eddington

We used to think that if we knew one, we knew two, because one and one are two. We are finding that we must learn a great deal more about 'and'. ”

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. ”

We have found that where science has progressed the farthest, the mind has but regained from nature that which the mind put into nature. ”

Shuffling is the only thing which Nature cannot undo. ”

It is one thing for the human mind to extract from the phenomena of nature the laws which it has itself put into them; it may be a far harder thing to extract laws over which it has no control. ”

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

It is impossible to trap modern physics into predicting anything with perfect determinism because it deals with probabilities from the outset. ”

It is sound judgment to hope that in the not too distant future we shall be competent to understand so simple a thing as a star. ”