It's not a man made concept but a brain perceived illusion. We have no chance to get what reality is since everything we know is the result of the indirect interpretation of our imperfect brain.
If given super powers, what hero name would you use?
Read some papers/books about our mind written by Sir Roger Penrose. He argues that our mind is a quantum computer and thus it can't be simulated by the current computers based on The Turing machine. Once you try to get info about the quantum states of the microtubules inside the neurons the wave function will collapse immediately. Many people think this is nonsense - but he is Nobel Laureate in Physics and one of the most brilliant living mathematicians.
I've never touched any alcoholic beverage since the moment of my first drunk. I deeply realized that the clear mind is the most valuable gift under the stars ! A lot of people think I'm not normal when I have such view !