The most exciting phrase to hear in science, the one that heralds new discoveries, is not 'Eureka!' but 'That's funny...'
Isaac Asimov
And above all things, never think that you're not good enough yourself. A man should never think that. My belief is that in life people will take you at your own reckoning.
Isaac Asimov
People who think they know everything are a great annoyance to those of us who do.