The Poison of Subjectivism

Reason. Everyone possess something called reason, and most of the times everyone define what is right and wrong based on their reasons. This is what is called subjectivism. "After studying his environment man has begun to study himself. Up to that point, he had assumed his own reason and through it seen all other things." Yet, it might be possible that people think they are right and that their reasons are correct, but it might be wrong. A person can become too arrogant and proud of his own knowledge and reason. Then, even the smartest person in the world could become stupid and make the stupidest decisions ever. There is also what is called the modern view of subjectivism. The modern view tells that "to say that a thing is good is merely to express our feeling about it; and our feeling about it is the feeling we have been socially conditioned to have." This modern view is wrong because it tells us to base everything on the way we feel and on how society views stuff. If society tells you that something is correct, then it is ok to do that. For example, there are some states where same sex marriage is legal. The society is telling us that same sex marriage is correct. Is it really ok and correct to do what society tells us to do? Even the society that we are living in is ruled by men. Men are sinful creatures. We are all fallen creatures. Then, what should we do to do what is right? We have to follow the moral law (the Law of Human Nature that we talked about in Mere Christianity). This common law that God has put in our heart will tell us what is right and wrong and prevent us from making stupid decisions by following our sinful selves.
"But we, favoured beyond the wisest pagans, know what lies beyond existence, what admits no contingency, what lends divinity to all else, what is the ground of all existence, is not simply a law but also a begetting love, a love begotten, and the love which, being these two, is also imminent in all those who are caught up to share the unity of their self-caused life. God is not merely good, but goodness; goodness is not merely divine, but God."