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。
世界是一本书，不旅行的人只读了一页。
我不让恐惧定义我，我让它磨砺我。
The truth is rarely pure and never simple.
The act of painting is an act of meditation.
艺术家必须先创造火花，才能点燃火焰。