数学的统一性不是幻觉，而是等待被揭示的现实。
The secret of being miserable is to have leisure to bother about whether you are happy or not.
"We are all born mad. Some remain so."
翻译：犯错不可怕，勇敢改正、迅速向善才可贵，及时止损比固执己见更能减少损失。
教育者的心必须是一团活生生的火焰，是温暖和光明的源泉。