Besides this preparation one needs a vehicle, a vehicle in which one journeys. That vehicle has two wheels, and they are balance in all things. A man who is one-sided, however great his power of clairvoyance or clairaudience, whatever be his knowledge, yet is limited; he cannot go very far, for it requires two wheels for the vehicle to run. There must be a balance, the balance of the head and the heart, the balance of power and wisdom, the balance of activity and repose. It is the balance which enables man to stand the strain of this journey and permits him to go forward, making his path easy. Never imagine for one moment that those who show lack of balance can ever proceed further on the spiritual journey, however greatly in appearance they may seem to be spiritually inclined. It is only the balanced ones who are capable of experiencing the external life as fully as the inner life; to enjoy thought as much as feeling; to rest as well as to act. The center of life is rhythm, and rhythm causes balance.