The real genius here lies in how MacArthur reframes defeat as redirection—not through mere optimism, but by insisting on agency. Most people accept retreat as surrender; he's claiming that the *decision itself* belongs to the retreater, not to circumstance. When a company closes an underperforming division to focus on its core business, or when someone leaves a prestigious job that's draining them, they're practicing this same rhetorical move: converting a loss into a choice. The quote's power comes from that single word, "advancing"—it strips away the shame that usually clings to withdrawal and restores your role as the author of your own story.