我不是因为快乐而歌唱，而是因为歌唱而快乐。

The more we uncover, the more complex the story becomes.

Success is not the key to happiness. Happiness is the key to success.

Ideas are like fish. If you want to catch little fish, you can stay in the shallow water. But if you want to catch the big fish, you've got to go deeper.

学习的唯一途径就是生活。

我从不放弃。我从不屈服。