Final answer:
The first formulation of Kant's Categorical Imperative states that we should only act according to maxims that we can become a universal law. This means considering if everyone acting in the same way would lead to a consistent and moral outcome. For example, lying violates this formulation as it undermines trust and communication.
Step-by-step explanation:
The first formulation of Kant's Categorical Imperative states: "Act only according to that maxim through which you can at the same time will that it become a universal law" (Kant 1997a, 4:421). This means that when we make a moral decision or choose an action, we should consider if we would want everyone to act in the same way in similar circumstances. If the action can be consistently and universally applied, then it is morally right.
For example, lying is a violation of the first formulation. If everyone lied, trust and communication would break down, making it impossible to achieve our desired goals. Therefore, according to Kant, we have a moral duty to always tell the truth, as telling the truth can be consistently universalized as a moral law.
The first formulation of Kant's Categorical Imperative thus emphasizes the importance of acting according to universal principles and considering the consequences if everyone were to act in the same way.