‘Your mind retains memory of all past stimulations—those that evoke fear and those that generate comfort. Your mind also imagines situations that frighten you and comfort you. Goaded by your ego, you suppress memories that cause pain and prefer memories that bring pleasure. Goaded by your ego, you imagine situations that the ego seeks and shuns. Right now, Arjuna, on this battlefield, nothing has happened. But a lot is occurring in your mind—memories resurface as ghosts and imagination descends like a demon. That is why you suffer.