Any system which allows men to choose their own future will end by choosing safety and mediocrity, and in such a Reality the stars are out of reach.

Grip the nettle firmly and it will become a stick with which to beat your enemy.

Pierre Curie, a brilliant scientist, happened to marry a still more brilliant one-Marie, the famous Madame Curie-and is the only great scientist in history who is consistently identified as the husband of someone else.

God, how that stings! I've spent a lifetime loving science fiction and now I find that you must expect nothing of something that's just science fiction.

Theories are not so much wrong as incomplete

The Three Theorems of Psychohistorical Quantitivity: The population under scrutiny is oblivious to the existence of the science of Psychohistory. The time periods dealt with are in the region of 3 generations. The population must be in the billions (±75 billions) for a statistical probability to have a psychohistorical validity.

No sensible decision can be made any longer without taking into account not only the world as it is, but the world as it will be.