Yes, indeed. Yoga shakti necessarily needs to be practised. Celibacy should be maintained. This is extremely important. The person should also have the knowledge of medicine. In addition, knowledge of astrology and psychology should also be had. Thereafter stringent efforts should be put in the various ragas. A melodious voice is another pre-requisite. The person should have the expertise to select suitable conditions that render the ragas most effective. The ragas that can be sung (alaap) in the afternoon should not be sung in the night. A control over musical notes should also exist. The method of producing these musical notes should be known.

(Bhaktimala 1991)