快乐的最好方式是让别人快乐。
The best way to be happy is to make others happy.
The best mathematics is that which you do not understand at first glance.
We are all prisoners of our own minds, and it is only through self-reflection that we can break free.
How wonderful that we have met with a paradox. Now we have some hope of making progress.
We act as though comfort and luxury were the chief requirements of life, when all that we need to make us happy is something to be enthusiastic about.