The moment you have any aim you are separate from the whole. You have a private goal, and to have a private goal is the root of all ego. Not to have a private goal is to be one with the whole, and to be one with the whole is possible only if you are aimlessly wandering.
A Zen person is a wanderer, aimless, with no goal, with no future. Moment-to-moment he lives without any mind; just like the dry leaf he makes himself available to the winds. He says to the winds, “Take me wherever you want.” If he rises on the winds high in the sky he does not feel superior to others who are lying down on the ground. If he falls to the ground he does not feel inferior to others who are rising on the wind high in the sky. He cannot fail. He cannot ever be frustrated. When there is no goal, how can you fail? And when you are not going anywhere in particular, how can you be in frustration?