I used to suffer particularly because the poor animals must endure so much pain and want. The sight of an old, limping horse being dragged along by one man while another man struck him with a stick he was being driven to the Colmar slaughterhouse - haunted me for weeks.
You do it for the highs, when you're totally engrossed and everything's flowing and whatever you want, you get. It's like magic. That's why you play the game. That's what it's for. That's why you work.