A maxim is a subjective principle of action and must be distinguished from an objective principle-namely,a practical law.The former contains a practical rule determined by reason in accordance with the conditions of the subject(often his ignorance or his inclinations);it is thus a principle on which the subject acts.A law,on the other hand,is an objective principle,valid for every rational being;and it is a principle on which he ought to act-that is,an imperative.
Differentiation between maxism and objective principle (a practical law)