多疑的人是不会因此而满足的；他们往往不是因为有了什么理由而嫉妒，只是为了嫉妒而嫉妒，那是一个凭空而来、自生自长的怪物。
Don't be afraid of failure when facing challenges. Every failure is a step towards success.
在数学中，提出问题的艺术必须比解决问题更有价值。
I think it's important to have a good hard failure when you're young... I learned a lot from that. Because it makes you kind of aware of what can happen to you. Because of it, I've never had any fear in my whole life when we've been near collapse and so on. I've never been afraid.
光勤劳是不够的，蚂蚁也是勤劳的。要看你为什么而勤劳。