"Historian Barbara W. Tuchman on the "Art of Writing"
'The most important thing about research is to know when to stop.… One must stop before one has finished; otherwise, one will never stop and never finish.… I… feel compelled to follow every lead and learn everything about a subject, but fortunately I have even more overwhelming compulsion to see my work in print."
"Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research."
~ Albert Einstein
"There are known knowns; there are known unknowns, and then there are unknown unknowns."
~Donald Rumsfeld, former U.S. Secretary of Defense