I don’t need to be perfect, I just need to be better than yesterday.
No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.
无论多么复杂或精细,所有行为都可以用刺激和反应来解释。
【译文】树应该遗憾自己的枝上长不出叶子,不要抱怨太阳偏心眼。人的一切都是命中注定的,一星半点也由不得自己。