Ethics: Moral/Immoral, Right/Wrong, Permissable/Prohibited, Virtue/Vice.
Positive or Negative. What should I do, and what shouldn't I do.
When you are poor, you have little care for ethics. If you and your family are starving, you will not care to consider whether what you are doing to provide sustenance is moral or immoral. You'll do whatever it takes to survive.
When you meet your survival needs, you consider aesthetics next. When you study aesthetics through your experiences, you gradually begin to find some things appealing, and some things repulsive. Some things good, some things bad.
When you realize that some things are good, and some things are bad, you wonder why that is the case. You search for answers in doctrine.
Doctrine guides you to act in ways to maximize the good through ethics.