What is good, what is bad

Vladimir Mayakovsky
The little son to his father came,
and asked the little one:
- What is good
and what is bad?
Where did this division for good and bad. First, it was invented by man. So it does not make any sense. For a living organism, there is not, but for a person who thinks about his importance and superiority, it is important, it's his job, although I do this shit not with my hands, but with something else ...
And yet to what in our life, there are all possible divisions on conventions and rules. Maybe at first it all started as a game or a game, but then everything turned into a "serious" event. Well, then, can not stop. No matter how we define good or bad, all this exists in our life, it is and therefore has the right to be. A division is conditional, and most likely it exists, because otherwise nothing will surround us. We will all perceive only in the form of actions. And with the division into qualities, we can still select these actions and even make them important for the existence of a living organism.
I would not attach so much importance to all such concepts, which, moreover, have different meanings in different situations. To kill a person for food is bad, to kill a man for the flag of his country is good. Only thanks to this division we kill. It quickly noticed the church and came up with repentance and confession of sins. I went to church, prayed, asked for forgiveness and again I am ready to kill.