Categorical Imperative: A central tenet of deontological ethics proposed by Immanuel Kant, which states that one should act only in accordance with that maxim through which you can at the same time will that it become a universal law.
Moral Absolutism: The belief that there are absolute moral standards against which moral questions can be judged, and that certain actions are right or wrong regardless of the circumstances or their consequences.
Moral Duty: An obligation or requirement to perform a certain action, based on moral principles or rules, rather than on the basis of the consequences of the action.