When you’re in a tough spot, remember why you started.
当你处于困境时，记住你为什么要开始。
理论物理学是一种形而上学。
The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.
实现明天的唯一限制将是我们今天的疑虑。
Women's stories need to be told and retold.