"Purpose is what gives meaning to profit."
"The past is a puzzle, and the historian is the person who tries to put the pieces together."
【释义】一个人的心志直接影响一个人的气节,而气节是统帅身体的重要支撑。
数学的本质不是使简单的事情复杂化,而是使复杂的事情简单化。