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

"A writer must be a rebel against all forms of oppression, both visible and invisible."

因为服从是如此困难，所以相信也是如此困难。

语言是一种皮肤：我用我的语言摩擦他人。就好像我有词语代替手指，或者手指在词语的尖端。