I have never looked upon ease and happiness as ends in themselves. This ethical basis I call the ideal of the pigsty.
Ninety nine failed solutions equals a gain of 99 pieces of information.
Cherish the questions, for the answers keep changing.
The step between genius and insanity is very short.
A problem cannot be solved at the level of consciousness in which it occurs.
No idea is conceived in our mind independent of our five senses [i.e., no idea is divinely inspired].