“When the past has passed from you at last, let go. Then climb down and begin the rest of your life. With great joy.”

Lange was notably rotund.
Source: A New Zealand Dictionary of Political Quotations, p. 97.

Source: Into the Wild (1996), Ch. 14.
Context: Early on a difficult climb, especially a difficult solo climb, you constantly feel the abyss pulling at your back. To resist takes a tremendous conscious effort; you don't dare let your guard down for an instant. The siren song of the void puts you on edge; it makes your movements tentative, clumsy, herky-jerky. But as the climb goes on, you grow accustomed to the exposure, you get used to rubbing shoulders with doom, you come to believe in the reliability of your hands and feet and head. You learn to trust your self-control. By and by your attention becomes so intensely focused that you no longer notice the raw knuckles, the cramping thighs, the strain of maintaining nonstop concentration. A trancelike state settles over your efforts; the climb becomes a clear-eyed dream. Hours slide by like minutes. The accumulated clutter of day-to-day existence — the lapses of conscience, the unpaid bills, the bungled opportunities, the dust under the couch, the inescapable prison of your genes — all of it is temporarily forgotten, crowded from your thoughts by an overpowering clarity of purpose and by the seriousness of the task at hand. At such moments something resembling happiness actually stirs in your chest, but it isn't the sort of emotion you want to lean on very hard. In solo climbing the whole enterprise is held together with little more than chutzpah, not the most reliable adhesive.

Pitchfork http://pitchfork.com/features/interviews/7926-louis-ck/

The Little Cloud.
Bartlett's Familiar Quotations, 10th ed. (1919).

Hays translation
Source: Meditations (c. 121–180 AD), Book II, 5

Source: Don't Sweat the Small Stuff ... and it's all small stuff: Simple Ways to Keep the Little Things from Taking Over Your Life

Song, Act I, Scene ii
The Foresters, Robin Hood and Maid Marion (1892)