Concentration, meditation, all these help to make the spirit its natural self again, but the vehicles that the spirit uses in order to experience life must help the spirit to become natural. These vehicles are the mind and the body. However great the musician, if the instrument is out of tune he can do nothing with it. To say that only the spirit matters and the body does not count is not right. Therefore it is necessary that first both mind and body be fit vehicles for the spirit to use.