The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
——赫尔曼·梅尔维尔
领导力在于激励他人，让他们在曾经看到局限的地方看到可能性。
The key to investing is to have a margin of safety.
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.