"<p>I mean: we have to maintain our authority over our emotions. Only with great care, fairness and experience can we remain masters of our senses. He who is violent with himself will fail. It's a wild herd, a herd of senses. They fight man with every weapon, like catch-as-catch-can wrestlers, respecting no rules of the game, kicking, pinching and biting. There is something both fearful and magnificent in their rebellion. Man lives as long as he has passions. But passions can be educated. Selfishness, lust, carnal hunger and thirst can be humanized. Greed can be transformed into a useful human will. Just as wind, fire, and light can be tamed into useful forces fit for human service - even if they are so powerful in the world, whipping the sea and burning forests and cities, man is stronger! -, so may the forces and passions be restrained which pervade the human body, and rule our hearts and nerves. These wild forces can be trained for human service. To do this, it takes a great deal of experience, a great deal of sorrow, a great deal of will and superhuman strength.</p>"