数学的本质不是使简单的事情复杂化，而是使复杂的事情简单化。
The writer’s duty is to rebel, to resist, to never be complacent.
Social progress requires the organic combination of individual freedom and social responsibility.
Just the discipline of having to put your thoughts in order with somebody else is very useful thing.
"To give is to receive, to love is to be loved, and to live is to let live."
