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.