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

The important thing is not to stop questioning. Curiosity has its own reason for existing.

The best way to learn is by doing, not just by listening or reading.

命题是断言某事是或不是事实的陈述。

心理学的任务是绘制意识的结构图。