And when you’re down in the hole， when that moment comes， it’s really okay to feel bad for a little while. Give yourself time to mourn what you think you may have lost but then here’s the key， learn from every mistake because every experience， encounter， and particularly your mistakes are there to teach you and force you into being more who you are. And then figure out what is the next right move.
Sustainability is not an option—it's a responsibility we owe to the next generation.
现在王公大人从事于音乐,损害夺取人民的衣食之资,仅从命人听乐这一点来看就已经很厉害了。
在数学中，提出问题的艺术必须比解决问题更有价值。