Take a simple idea and take it seriously.
把一个简单的想法认真对待。
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 only way to do great work is to love what you do.
The secret of change is to focus all of your energy not on fighting the old, but on building the new.
The strength of the state is crucial for the success of any society.
The secret of being miserable is to have leisure to bother about whether you are happy or not.