Only by continuous learning can we make continuous progress.

There is no easy walk to freedom anywhere, and many of us will have to pass through the valley of the shadow of death again and again before we reach the mountaintop of our desires.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

忠于自己，永远不要让任何人改变你。

Ignorance is the root and stem of all evil.