The only conclusion in life that I can draw is that all things are concepts. Real objects can only be concepts within my mind, so abstract objects can only be concepts within my mind as well. Nothing can escape this conclusion. Concepts do not “float” out there in the world independent of the mind. They must be constructs of the mind.
Before the first person came into being and after the last person passes away all concepts did not exist. The concepts of self, man and society exist as long as at least one person exists to remember them. Perhaps consciousness is like this, and nothing more.