The best way to learn mathematics is to do mathematics.

The most alluring thing a woman can have is confidence.

情绪可以自动捕获注意力，展示了情感系统和认知系统之间的密切联系。

I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  

人生就系一场冒险，唔好怕跌低。