It is not only strength or nervous energy that enables man to stand on earth. Besides muscular strength and nervous energy there is balance; it is balance which enables man to stand and walk without falling. One may have muscular strength and nervous energy, but in the absence of balance one will not be able to stand or walk. And when we think of the mind, is it reasoning, is it far-reaching imagination which makes man thoughtful? No, it is balance. There are many whose imagination is so great that they can float in the air for hours together, and there are others whose reason is so powerful that their thoughts go round and round and end nowhere. If there is anything that makes man really thoughtful, it is not great reasoning or far-reaching imagination; it is balance.