This story tells us about will-power. The mind is just like a wild horse, and the will is the only thing which can catch it. The thoughts and imaginations are all so unruly that we cannot think " or feel what we wish. If we were able to do so, then neither could sorrow touch us again, nor could unhappiness come near, because it is the thoughts and imaginations which bring sorrow. If we could think what we wished to think, if we could feel what we wished to feel, life would be a heaven for us. When we do not feel what we wish to feel, when we do not think what we wish to think, it is just because of lack of will-power. That which is the governing power cannot hold it.