False happiness renders men stern and proud， and that happiness is never communicated. True happiness renders them kind and sensible， and that happiness is always shared.

Ignorance is the breeding ground of tyranny.

未来属于今天为之准备的人。

人生的每一门课程会随时间依次呈现给你。掌握所需的一切能力取决于你的内心。一旦你真正掌握了一门课的精髓，你自然就会进入下一门课。只要你还活着，你就仍然有课要学。