The love of a teacher is like drops of dew, which can revive even a withered soul; the love of a teacher is like a warm spring breeze, which can melt even frozen emotions.

现实总是比小说更丰富、更复杂。

理解复杂系统的行为需要一种新的思维方式，一种接受不确定性和不可预测性的思维方式。

We are healed of a suffering only by experiencing it to the full.

没有严格的执行，认证标准就毫无意义。