"Every saint has a past, and every sinner has a future."

I'm the truth, don't ever doubt me.

"In observational studies, we often have to rely on assumptions that are not directly testable."

如果用心一旦松散，那么万事都做不好。如果用心一旦粗疏，那么凡事不能聚精会神。用心一旦固执，凡事就不能见其本来面目。

魔鬼最厉害的伎俩就是让世界相信他不存在。

我不害怕把想法推向极端。