Harinama in Israel (Album 20 photos)
Srila Prabhupada: Although the Hare Krishna maha-mantra is powerful in itself, a disciple upon initiation receives the mantra from his spiritual master, for when the mantra is chanted by the spiritual master, it becomes more powerful.
(Srimad-Bhagavatam, 4.24.32 Purport)
See them here: http://goo.gl/8VGVyZ