变革在开始时最难，在中间最混乱，在结束时最好。
Change is hardest at the beginning, messiest in the middle, and best at the end.
我尝试将每个项目都当作我的第一个项目来处理。
What we gain by experience is more real and more solid than what we gain by reasoning.
No wise pilot, no matter how great his talent and experience, fails to use a checklist.
最终，我们都只是在试图理解混乱。