Pain is pain. Pleasure is also painful. It’s not about the experience but about the craving. Craving for happiness is our nature. Our true nature is bliss. Craving for happiness causes unhappiness. We all shun pain and run after pleasure but pleasure ever keeps running away from you if you keep chasing it!
When you are craving pleasure, its absence causes pain. When you are indulging in pleasure the fear that it might go away is always present and causes pain. When pleasure has gone away the memory of pleasure causes pain. So your life moves from pain to pain and in pain. Unhappiness has been termed pain in this discussion. Pain strictly is healing mechanism of body.
Peace is beyond unhappiness and happiness. Bliss is beyond pleasure and pain. Love is beyond pain and pleasure. Light is knowing this! Peace, bliss and love have no opposites. Light has no opposite. Darkness is the absence of light. Goodness has no opposite, evil is the absence!
When you stop craving for pleasure, pain stops. When you accept life, life accepts you!