Any change, even a change for the better, is always accompanied by drawbacks and discomforts.
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。
In the end, we are all defined by the choices we make.
生活是世界上最罕见的事情。大多数人只是存在，仅此而已。
数学的进步归功于那些不是被应用的欲望驱动，而是被发现的喜悦驱动的人。