阈限性是两个阶段之间的过渡状态，个体不再处于前一个状态，但尚未进入下一个状态。
We don't inherit forests from our ancestors, we borrow them from our children.
先爱自己，因为这是一切奇迹开始的地方。
Happiness is not just the absence of sadness; it's the presence of meaning.
"Happiness is not the absence of problems but the ability to deal with them."