You are never too old to set another goal or to dream a new dream.
You can’t let success get to your head and failure to your heart.
真正的快乐来自于内心的满足。
你越深入数学，就越能意识到一切是如何相互关联的。
"We always overestimate the change that will occur in the next two years and underestimate the change that will occur in the next ten. Don't let yourself be lulled into inaction."
Privacy protection is not an obstacle, but the foundation of trust.
It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary.