Devadas sings during a Yoga Vidya Satsang at Yoga Vidya Bad Meinberg the Maha Mantra - it is one of the best mantra to develop bliss and love. With this mantra you call God in its aspects as Hari (Vishnu), Rama and Krishna. Swami Sivananda appreciated this mantra beyond all measure and so in every Satsang of the Sivananda tradition is the Maha Mantra sung. You can find the Maha Mantra in the Yoga Vidya Kirtan Songbook as No. 2 as part of the Jaya Ganesha.