Thirdly, Moral right and wrong is not so much a simple, indivisible property, as an extensive Code of regulations, which cannot even be understood without a certain maturity of the intelligence.
If is not possible to sum up the whole field of moral right and wrong, so as to bring it within the scope of a single limited perception, like the perception of resistance, or of colour.

In regard to some of the alleged intuitions at the foundation of our knowledge, as for example time and space, there is a comparative simplicity and unity, rendering their innate origin less disputable.

No such simplicity can be assigned in the region of duty.
After the subject of morals has been studied in the detail, it has, indeed, been found practicable to comprise the whole, by a kind of generalization, in one comprehensive recognition of regard to our fellows.

But, in the first place, this is far from a primitive or an intuitive suggestion of the mind.

It came at a late stage of human history, and is even regarded as a part of Revelation.