Prabhupada Letters :: 1969.

"It is like electricity: if one is in touch with a bonafide Spiritual Master, and that Spiritual Master is in touch with his bonafide Spiritual Master, in this way an offering is transferred to Krishna."

Prabhupada Letters :: 1972.

"Unless there is connection with a bona fide Spiritual Master there is no possibility of making progress in spiritual life. So I have established ISKCON centers for intimate connection with the bona fide Spiritual Master."

Prabhupada Letters :: 1972.

"If the Americans can take this up seriously, why not others? We are trying to unify the whole population of this globe by this movement. There are blessings of Lord Chaitanya in this connection, and if we try sincerely it will be successful."