悲观主义者的决定性特征是，他们倾向于相信坏事会持续很长时间，会破坏他们所做的一切，并且是他们自己的错。
The defining characteristic of pessimists is that they tend to believe bad events will last a long time, will undermine everything they do, and are their own fault.
学习数学的唯一方法就是做数学。
音乐没有语言障碍。
Happiness is a gift and the trick is not to expect it, but to delight in it when it comes.
释义：他或许认为，物质的产生和消亡都源于气的聚散，气是物质生死循环的驱动力。