Kant says that when trying to decide whether an action is morally permissible, we must ask if we can consistently will that the maxim of our action should become .

A universal law.

Kant says that when trying to decide whether an action is morally permissible, we must ask if we can consistently will that the maxim of our action should become a universal law.

Explanation:

The moral concept in Kant drives from the idea of the universal law. According to him, humans must consider if their actions are good or bad if implies and are toward the world. If it is good for the world, it is morally acceptable. On the contrary, just forget. It's pretty simple on the surface, but when we analyze deeply we can see that moral is a complicated concept that is not easy to measure.