Mathematics is a living subject, constantly evolving with new ideas and discoveries.
The church has no power to enforce obedience, neither have any laws they made for that purpose, any binding force on anyone, but by his own consent.
自由的本质在于能够在不受他人任意干涉的情况下追求个人目标。
领导力是关于以勇气和同情心做出艰难的决定。
Don't be afraid to make mistakes. If you're not making mistakes, you're not trying hard enough.
学习的最好方法就是教。
"Every word is a step towards freedom."