Robert E. Dunn said this quote

My mother used to say not sleeping was the sign of a guilty mind. It could have been. There was a lot in my mind to feel guilty about. When you’re drunk and trying to sleep, your thoughts are visited by the ghosts of those deeds whose heat still glows hottest in your personal darkness. Our actions burn much longer than the moments in which they occur. And drunks like me, we hide from the glow of the embers by fueling other fires and hiding within the flames.