If we knew what we were doing it wouldn't be research.

Scientific research consists in seeing what everyone else has seen, but thinking what no one else has thought.

Fools make researches and wise men exploit them.

Just as the largest library, badly arranged, is not so useful as a very moderate one that is well arranged, so the greatest amount of knowledge, if not elaborated by our own thoughts, is worth much less than a far smaller volume that has been abundantly and repeatedly thought over.

By seeking and blundering we learn.

To write it, it took three months; to conceive it --three minutes; to collect the data in it --all my life.