What makes Sinatra's declaration so potent isn't the promise of improvement itself—it's the refusal to let the present moment become a footnote to tomorrow. He's not asking you to *tolerate* now in service of later; he's insisting that your willingness to believe in what's coming actually changes how you inhabit today, lending it urgency and grace. A person recovering from illness who genuinely expects their best years ahead doesn't merely survive the difficult months—they approach physical therapy with the energy of someone building toward something, not just escaping something. That shift in posture, from passive endurance to active anticipation, is where the real magic lives.