In this definition, will is defined as your personal choice, desires, opinions, and attitude about something; it is the reason we act the way we do. Duty is the sense of obligation to act in accordance with a particular law or rule. We don’t always do what is our duty because our will may desire something else. Other key definitions to understanding Kantian Ethics include the definition of maxim and the categorical imperative. A maxim can be thought of as the values or moral laws that you believe you should abide by. Maxims are subjective; they are personal to each individual. To determine whether your maxim can become universal, we use the categorical imperative. The categorical imperative is composed of three formulations: the universal moral law, the law of the end-in-itself, and the law of