心理学的任务是将复杂的心理现象还原为最简单的组成部分。
The task of psychology is to reduce complex mental phenomena to their simplest components.
"In observational studies, we often have to rely on assumptions that are not directly testable."
【译文】忍下一时的怨气，可以免除长久的忧患。遇到不利的情况学学乌龟，该缩头的时候就要把头缩回去。