All of our emotions are virtual, they are just illusory information. Next time you are happy or angry, try to find where the happiness is, where the anger is. Is it in your head? In what specific location in your brain? You won't be able to find it, it's not anywhere, it's just in the void. The void is our space of zero. 

By the time you see the river, you are already beyond it. By the time you see the mountain, you are already beyond it. When you can see your own fluctuating emotions, you are already beyond them. When you are not controlled by your own emotions, you can truly control yourself.