If there is any science man really needs it is the one I teach, of how to occupy properly that place in creation that is assigned to man, and how to … - Immanuel Kant

...I am never to act otherwise than so that I could also will that my maxim should become universal law.

The question here is not, “How conscience ought to be guided? For Conscience is its own General and Leader; it is therefore enough that each man have one. What we want to know is, how conscience can be her own Ariadne, and disentangle herself from the mazes even of the most raveled and complicated casuistical theology. Here is an ethical proposition that stands in need of no proof: No Action May At Any Time Be Hazarded On The Uncertainty That Perchance It May Not Be Wrong (Quod dubitas, ne feceris! Pliny - which you doubt, then neither do) Hence the Consciousness, that Any Action I am about to perform is Right, is in itself a most immediate and imperative duty. What actions are right, - what wrong – is a matter for the understanding, not for conscience. p. 251

That kings should be philosophers, or philosophers kings is neither to be expected nor to be desired, for the possession of power inevitably corrupts reason's free judgment. However, that kings or sovereign peoples (who rule themselves by laws of equality) should not allow the class of philosophers to disappear or to be silent, but should permit them to speak publicly is indispensable to the enlightenment of their affairs.