你不能两次踏入同一条河流。

At a restaurant do you order what you know is great， or do you try something new？ Do you make what you know will sell or try something new？ Do you keep dating new folks or try to commit to someone you already met？ The optimal balance for exploring new things vs exploiting them once found is: 1/3. Spend 1/3 of your time on exploring and 2/3 time on deepening. It is harder to devote time to exploring as you age because it seems unproductive， but aim for 1/3.

生命只是一连串孤立的片刻，靠着回忆和幻想，许多意义浮现了，然后消失，消失之后又浮现。

解析：君子要求的是自己，小人要求的是别人。

The most important ability of a product manager is to turn yourself into a fool.

We must learn from the past to innovate for the future.