有时我们会为某些事情感到悲伤，而我们不愿意告诉别人我们为此感到悲伤。
Sometimes we get sad about things and we don’t like to tell other people that we are sad about them.
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.
神经系统就像一个复杂的管弦乐队，每个神经元都在发挥自己的作用。
