Life is about taking chances, trying new things, having fun, making mistakes and learning from them.
The ratio of positive to negative emotions that predicts flourishing is about 3 to 1. Above that ratio, people tend to flourish; below it, they tend to languish.
学习数学的最好方法就是做数学。
梦想不是遥不可及的，只要你愿意去追。
The writer must be a perpetual dissident, a professional heretic.