A leaf will often take the indirect path down, spinning as it falls, turning or spiraling; it may even move upward again, caught in a rising draft or seesawing in the still air, but it is always falling. I cannot say one way wiser than the next to reach the ground, but must point out that it is a pleasant sight to see, and sit and watch, to rest beside a tree and find the falling leaves all taking their different paths to the earth. What prompts them? A breeze or time? I know not. But I watch the world.