Sometimes we stare so long at a door that is closing that we see too late the one that is open.
我们有时候专注于消失中的机会太久，以致于太晚发现开启的机会。
The best way to live is to love what you do.
求知若饥，虚心若愚。
For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.
解释：只有去学习才能懂得世间的道理；如果耻于向人求教，许多东西就会永不知晓。
成长是痛苦的，但没有什么比停滞不前更痛苦。