Success is not final, failure is not fatal: It is the courage to continue that counts.

The past is not dead; it is not even past.

The only thing necessary for the triumph of evil is for good men to do nothing.

The most exciting moments in mathematics are when you see connections between things that seemed unrelated before.

"We see our customers as invited guests to a party, and we are the hosts."

儿童并非弱者，他们有足够的智慧。