The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
没有“悲哀”提供平衡,“愉快”一词就会失去意义。
I'm not afraid of dying, I just don't want to be there when it happens.
Sustainability is not just a goal, it's a responsibility we owe to the future.