Leadership is not about being in charge. It's about taking care of those in your charge.
If you want something you’ve never had, you must be willing to do something you’ve never done.
不要担心你在数学上遇到的困难;我敢保证我遇到的困难比你还大得多。
在数学中,提出问题的艺术必须比解决问题更有价值。
唯一能阻止你的人是你自己。