Global challenges require global collaboration.
从长远来看,未来是由乐观主义者决定的。成为一个乐观主义者,不是要忽视现有的许多问题,而是想象怎么才能改善我们解决问题的能力。
Three grand essentials to happiness in this life are something to do, something to love, and something to hope for.
义务是由于对法则的敬重而产生的行为必要性。
I’m a great believer in solving hard problems by using a checklist. You need to get all the likely and unlikely answers before you; otherwise it’s easy to miss something important.