Look! and it can't be seen. Listen! and it can't be heard. Reach! and it can't be grasped. See nothing, hear nothing, grasp nothing. High, it isn't bright. Low, it isn't dark. Seamless, indefinable, continuous and unceasing. It originates from and returns to the realm of nothing. Formless form that includes all forms; image without an image. A clear slate. Subtle, beyond all conception. Illusive and evasive. Approach it and there is no beginning; follow it and there is no end. You can't know it, but you can be it, at ease in your own life. Just realize where you come: this is the essence of wisdom. Find the thread of TAO and hold on to it. Obvious, present, always around. Nothing is the key.