Great ambition is the passion of a great character. Those endowed with it may perform very good or bad acts. All depends on the principles which direct them.

Nothing is lost as long as courage remains

This soldier, I realized, must have had friends at home and in his regiment; yet he lay there deserted by all except his dog. I looked on, unmoved, at battles which decided the future of nations. Tearless, I had given orders which brought death to thousands. Yet here I was stirred, profoundly stirred, stirred to tears. And by what? By the grief of one dog.'

Napoleon Bonaparte, on finding a dog beside the body of his dead master, licking his face and howling, on a moonlit field after a battle. Napoleon was haunted by this scene until his own death.