“I understood Einstein's general theory of relativity, which meant that I knew how to demonstrate every essential property of it in a… — Lee Smolin Copy Share Image
Whenever a theory appears to you as the only possible one, take this as a sign that you have neither understood the… — Karl Popper Copy Share Image
“A few individuals, by extraordinary genius, or by the accidental acquisition of a good set of intellectual habits, may work without principles… — John Stuart Mill Copy Share Image
