The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.
思考的过程不是一系列分离的步骤，而是结构转换的连续流动。
The pursuit of mathematical knowledge is a never-ending adventure.