After all, who is likely to be the more productive contributor to the company, and to the world — the person who is healthy, rested, well-balanced, full of energy, and clear of mind, or the sleep-deprived, overweight, heart-attack-waiting-to-happen, psychologically unexamined, self-critical maniac? Who is more likely to be present enough to see the next breakthrough? Who is more likely to analyze problems clearly, for what they really are, instead of what they are assumed to be?