过去总是与我们同在，因为它滋养着现在。

可持续性不仅仅是植树，而是在正确的地方种植正确的树木，并确保它们世代繁茂。

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.

生存下来的不是最强壮的物种，也不是最聪明的物种，而是最能适应变化的物种。

笑，全世界便与你同声笑，哭，你便独自哭。

Over the centuries the Indians developed sign language for communicating phenomena of interest. Programmers from different tribes (FORTRAN, LISP, ALGOL, SNOBOL, etc.) could use one that doesn't require them to carry a blackboard on their ponies.

The existence of a legal system presupposes the existence of a rule of recognition.