I ought never to act except in such a way that I could also will that my maxim should become a universal law.

A metaphysics of morals is therefore indispensably necessary, not merely because of a motive to speculation- for investigating the source of the practical basi…

I do not, therefore, need any penetrating acuteness to see what I have to do in order that my volition be morally good. Inexperienced in the course of the worl…

Only the descent into the hell of self-knowledge can pave the way to godliness.

There is...only a single categorical imperative and it is this: Act only on that maxim through which you can at the same time will that it should become a univ…

[An attorney] can find it consistent with his dignity to turn wrong into right, and right into wrong, to abet a lie, nay to create, disseminate, and with all t…

Monsters remain human beings. In fact, to reduce them to a subhuman level is to exonerate them of their acts of terrorism and mass murder - just as animals are…