"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
~ Bertrand Russell
"The third-rate mind is only happy when it is thinking with the majority. The second-rate mind is only happy when it is thinking with the minority. The first-rate mind is only happy when it is thinking."
~ A. A. Milne
"To know that you do not know is the best. To pretend to know when you do not know is a disease."
~ Lao Tzu
"There is no good and evil, there is only power and those too weak to seek it."
~ J. K. Rowling (Professor Quirrell in Harry Potter and the Sorcerer's Stone
"Common sense is not so common."
"The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function."
~ F. Scott Fitzgerald
"Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand."
~ Albert Einstein
"Induction is the glory of science and the scandal of philosophy."
~ C. D. Broad