In my own case it’s taken me years to cultivate self-control to prevent my emotions from betraying themselves. Only a short time ago I was the conqueror of the world, commanding the largest and finest army of modern times. That’s all gone now! To think I kept all my composure, I might even say preserved my unvarying high spirits … You don’t think that my heart is less sensitive than those of other men. I’m a very kind man but since my earliest youth I have devoted myself to silencing that chord within me that never yields a sound now. If anyone told me when I was about to begin a battle that my mistress whom I loved to distraction was breathing her last, it would leave me cold. Yet my grief would be just as great as if I had the time. Without this self-control, do you think I could have done all I’ve done?
~ Napoleon (in a letter to Louis-Mathieu Mole)