The, again, Regulation of the Vital air is Yoga with qualities. In Yoga without qualities, the mind, freed from its functions, should be fixed. Only the regulation of the vital air which is said to be endued with qualities should, in the first instance, be practised, for, O king of Mithila, if the vital air be exhaled without mentally thinking upon a definite image, the wind in the neophyte's system will increase to his great injury.