The opening of the treatise introduces the idea that this work critiques practical reason itself, rather than just "pure" practical reason, to affirm the existence and importance of freedom in moral decision-making. Kant argues that while human beings are often swayed by empirical motives and desires, reason must ultimately govern one's will. He emphasizes that practical laws arise not from mere subjective maxims but from objective moral principles that can be rightly acknowledged by all rational beings. This foundational concept paves the way for exploring how moral imperatives should guide human action, setting a critical framework for the subsequent analysis of ethical obligations and the nature of freedom. (This is an automatically generated summary.)