"Sometimes the hardest part isn’t letting go but rather learning to start over."
有时候最难的部分不是放手,而是学会重新开始。
The hardest part of design is keeping features out.
释义:水一旦泼出去,就收不回来,后悔也来不及。  
The most successful modern states are those that have been able to harness the power of the market while maintaining a strong state capable of enforcing rules and providing public goods.