逻辑学研究不仅仅是关于形式系统，更是关于推理本身的本质。

To wear your heart on your sleeve isn't a very good plan; you should wear it inside, where it functions best.

I think that we communicate only too well, in our silence, in what is unsaid, and that what takes place is a continual evasion, desperate rearguard attempts to keep ourselves to ourselves.

The hardest part of design is keeping features out.

SILENCE. Speak not but what may benefit others or yourself; avoid trifling conversation.

只要现在能够停下来休息，那么就立刻停下来休息；如果要等到一切事情都办妥时再停下来，那么这样的时刻永远也不可能等到。