The correct answer to this open question is the following.
The response to the places respectively given to feelings and self-interest by these theories is that it is true that the various forms of Subjectivism and Egoism make morality a highly personal matter.
Every single individual has to be conscious of his acts. The way people think is the way people act or react, consciously, or unconsciously. It is a personal view of the things that happen around us and we interpret them according to our belief systems, education, and perspective. That is why subjectivism and egoism make morality a highly personal matter. It all depends on the way we received education in our family, in school, and the innate belief systems that make us what we are.
Knowing this, we should be more tolerant and respect the perspective and reality of other people because we cannot criticize another if we do not know what he or she is living and why.
