More quotes by Aristotle

"The secret to humor is surprise."
"Perfect friendship is the friendship of men who are good, and alike in excellence; for these wish well alike to each other qua good, and they are good in themselves."
"My best friend is the man who in wishing me well wishes it for my sake."
"Knowing yourself is the beginning of all wisdom."
"Rhetoric may be defined as the faculty of observing in any given case the available means of persuasion. This is not a function of any other art."