One of Dr. Leo F. Buscaglia many books is called, THE WAY OF THE BULL. One of his sayings is printed in the beginning of the book: "Man must learn to let go as easily as he grasps or he will find his hands full and his mind empty."
Here is a little background from the back of the book:
Here is the beautiful story of Buscaglia's travels from Japan and Hong Kong to Cambodia and Calcutta on his personal quest for discovery. As he learned, according to centuries-old Oriental tradition, the bull represents life, energy, truth and action. But once found, the bull cannot be tethered; he must be free. One must seek him-and his meaning--over and over again.