The course of human life is not determined by drives or environment alone, but by creative self-direction as well.

不要让失败定义你，把它当作通往更好的垫脚石。

我可能爱上你了。不过我要等到我确定后再告诉你。

There is no point treating a depressed person as though she were just feeling sad, saying, 'There now, hang on, you'll get over it.' Sadness is more or less like a head cold- with patience, it passes. Depression is like cancer.

Understanding the computational complexity of learning problems is essential for developing efficient algorithms.