家是这样一个地方,当你必须去那里时,他们必须收留你。
Home is the place where, when you have to go there, they have to take you in.
真正的幸福的源泉在我们自身。一个人只要自己善于追求幸福,别人是无法使他落到真正悲惨的境地的。
The only way to learn mathematics is to do mathematics.