解释：乌鸦聚集在一起，虽然看上去很和好，实际上并不亲密；不慎重地结交朋友，虽似牢固，终必破裂。

始终追求卓越，而不是完美。

Flow is being completely involved in an activity for its own sake. The ego falls away. Time flies. Every action, movement, and thought follows inevitably from the previous one, like playing jazz. Your whole being is involved, and you're using your skills to the utmost.

行为不仅仅是对刺激的反应，而是由期望和目的引导的。