实现明天理想的唯一障碍是今天的疑虑。
The first duty of a man is to think for himself.
Always take the high road, it's far less crowded.
I don’t need validation from anyone, I know my worth.
数学的本质不是把简单的事情复杂化，而是把复杂的事情简单化。
质量意味着在没人看的时候也要把事情做对。