The real wisdom here isn't about optimism—it's about *focus as a discipline*. When we're drowning in difficulty, our instinct is to thrash about, but Aristotle suggests that sight itself demands concentration; light exists around us even in despair, yet we must deliberately train our attention to perceive it. A person grieving a loss might notice this truth when an old song plays or morning breaks through the window, and realizes the beauty was there all along—their grief didn't create darkness so much as cloud their capacity to notice. The quote matters because it shifts responsibility from circumstances back to us: we cannot always choose our darkness, but we can choose where we look.