Part of the Zen tradition, Koans are meant to precipitate Enlightenment. The Shadow of the Whip is a beautiful Koan, that brings the essence of the Truth to the fore. Come with an open mind, and unburdened heart, and be present to this opportunity to Awaken.
On the spiritual path, we are always on a quest for achieving this and achieving that, with the hope that one day it will result in the achievement of enlightenment. But enlightenment is not an achievement! Where does that leave all your activity, your frenetic doing? What you may be missing is the secret of relaxation.