在数学中，提出问题的艺术必须比解决问题更有价值。
The only limits in life are the ones you make.
When something terrible happens people wake up.
解释：饿了再吃，粗茶淡饭味道也像吃肉一样可口。安稳走路就不会感觉到劳累，权当坐车。
The moment you recognize what is beautiful in this world, you stop being a slave.
我努力在场上场下都做到最好的自己。