I have made it a rule of my life never to regret and never to look back. Regret is an appalling waste of energy, and no one who intends to be a writer can afford to indulge in it. You can’t get it into shape; you can’t build on it, it’s only good for wallowing in. Looking back, of course, is equally fatal to Art. It’s keeping you poor. Art can’t and won’t stand poverty.