过去永远存在，现在永远是过去。
不要吹开毛发去寻找小疤痕，不要洗净污垢去察看难以知晓的毛病。
The roots of education are bitter, but the fruit is sweet.
Psychology is the science of mental life in its adaptive relations.
We must rethink our relationship with nature to ensure long-term survival.
死者并非无力。我说过，死了吗？没有死亡，只有世界的变化。