生活的目的不是快乐。它是有用、可敬、富有同情心，让你活得有意义且活得好。
The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.
The man who has no inner life is the slave to his surroundings.
Never stop learning, because the world never stops changing.
In the age of information overload, fast learning is the ultimate competitive advantage.
The language of mathematics is universal, transcending cultural and linguistic barriers.
The temporary can become permanent if it serves people well.