It is the opinion of most thoughtful students of life that happiness in this world depends chiefly on the ability to take things as they come. An instance of one who may be said to have perfected this attitude is to be found in the writings of a certain eminent Arabian author who tells of a traveller who, sinking to sleep one afternoon upon a patch of turf containing an acorn, discovered when he woke that the warmth of his body had caused the acorn to germinate and that he was now some sixty feet above the ground in the upper branches of a massive oak. Unable to descend, he faced the situation equably. 'I cannot,' he observed, 'adapt circumstances to my will: therefore I shall adapt my will to circumstances. I decide to remain here.' Which he did.