“The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle.”
-Albert Einstein

“By doubting we come at truth.”
-Marcus Tullius Cicero

“All truths are easy to understand once they are discovered; the point is to discover them.”
-Galileo Galilei