永不言弃。
The greatest problem for mathematicians now is probably the Riemann Hypothesis.
一家公司的力量在于其员工。赋予他们力量，就是赋予未来力量。
The deeper the sorrow, the greater the art.
Denying or deflecting a compliment is rude. Accept it with thanks， even if you believe it is not deserved.
要给儿童提供一个使他们得到满足的环境，必须努力了解儿童的需要。
I like talking to a brick wall, it’s the only thing in the world that never contradicts me.
The act of creation is an act of defiance.