The concept of progress is inseparable from the concept of catastrophe.

The past is hidden somewhere outside the realm, beyond the reach of intellect, in some material object (in the sensation which that material object will give us) which we do not suspect.

民主是唯一能够反映人类精神不屈不挠追求自由的制度。

不要委屈自己而迎合他人，不要用不正当的手段去获取名誉。