Kant's deontological moral philosophy is based on the categorical imperative and the idea that morality depends on duty and the good will rather than consequences. The categorical imperative has three formulations: first, act only according to maxims that could become universal laws; second, act to treat humanity as an end in itself, never as a mere means; and third, act as a member of a kingdom of ends where all rational beings give universal laws. Islamic philosophers criticize Kant for making human rationality the sole source of morality and for proposing subjective moral principles rather than objective divine commands. For Islam, intention includes knowledge, will, and obedience to God's commands, and intention combined with action determines moral worth.