The only way to keep improving is to keep pushing yourself.
The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum.
我喜欢让我笑的人。我真心认为笑是我最喜欢的事情。它能治愈许多疾病。这可能是人身上最重要的东西。