向高处攀登的奋斗本身足以充实一个人的心灵。必须想象西西弗斯是幸福的。
The only thing you can control is your effort and your attitude.
Mathematics is the most beautiful and most powerful creation of the human spirit.
A life without examination is not worth living.
释义：宽容的人能设身处地为他人着想，不拿自己的标准去衡量别人。