Dion Fortune

The difference between magic and meditation methods is the difference between drugs and diet—medicines will do swiftly what diet can only effect slowly, and in critical cases there is no time to wait for the slow processes of dietetics, so it must be either medicines or nothing. Nevertheless, drugs are no substitute for right diet and wholesome regime, and although magic enables a speedy and potent result to be attained, is is only by means of right understanding and right ethics that the position which has been won can be held.”
― Dion Fortune, Esoteric Orders and Their Work and The Training and Work