明智地思考却愚蠢地行动，这是人性。
The past is never dead. It's not even past.
"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."
The division of labour， so far as it can be introduced， occasions， in every art， a proportionable increase of the productive powers of labour.
"Mathematics is the science of patterns, and we study them to learn how to think logically, critically, and creatively."