The rules of morality need to be proven, so they are not innate.
Chronologically, these are the processes by which ideas are formed in our minds: -Direction we discover the world, and therefore ideas appear in our mind -These, more and more familiar, return to our memory and we give them names -The spirit of other abstract ideas, these ideas brought by the senses: it is the general concepts -Mind reasoning about these concepts and find others.
Essay concerning Human Understanding tries to identify the various faculties of our mind, and how ideas are formed.
Thus, we may discover the limits of knowledge, and therefore, we can identify an area of thought where truth is attainable, and another where this is impossible.
An essay concerning human understanding is one of the greatest philosophy works : Locke, folllowing, Descartes, described the new world of spirit and consciousness, thaht make human dignity.
According to Locke, the understanding is the sign of human superiority over the animals and is comparable to the eye: it makes us see things, but it does not see itself naturally.