“Suppose someone standing by a clear, sweet spring were to curse it: it just keeps right on bringing drinkable water bubbling up to the surface. Even if he throws mud or dung in it, before long the spring disperses the dirt and washes it out, leaving no stain. So how are you to have the equivalent of an ever-flowing spring? If you preserve your self-reliance at every hour, and your kindness, simplicity, and morality.” – Marcus Aurelius