Rational beings must act in accordance with principles that could be universally accepted from "summary" of Groundwork for the Metaphysics of Morals by Immanuel Kant
Rational beings, by nature, possess the capacity for reason and the ability to make decisions based on principles. These principles must be such that they could be universally accepted, meaning that they are applicable to all rational beings in all situations. When a rational being acts in accordance with principles that could be universally accepted, they are essentially following a moral law that applies to everyone. This moral law is not contingent on personal desires or preferences, but rather on the inherent rationality of the being. For Kant, the foundation of morality lies in the concept of the categorical imperative, which is a principle that commands certain actions simply because they are right and not because they lead to any particular goal or end. This imperative serves as a guide for rational beings to determine the morality of their actions. By adhering to the categorical imperative, rational beings are able to act in a way that is consistent with universal principles, thereby fulfilling their moral duty. This duty is not based on subjective inclinations or external factors, but rather on the rational nature of the being.- The concept of rational beings acting in accordance with universally accepted principles is central to Kant's moral philosophy. It underscores the importance of reason and duty in guiding moral behavior, and highlights the universal nature of morality that transcends individual preferences or circumstances.
