If after accepting the ...

If after accepting the spiritual master and being initiated one does not follow the rules and regulations of devotional service, then he is again fallen.
 A. C. Bhaktivedanta Swami Prabhupada

Quotes from the same author

When a pure devotee or spiritual master speak, what he says should be accepted as having been directly spoken by the Supreme Personality of Godhead in the Parampara System.
 A. C. Bhaktivedanta Swami Prabhupada
First birth is from your parents, but real birth, real life, begins when one accepts a bona fide spiritual master and renders service unto him. Then the path is open for going back to home, back to Godhead, to live eternally in full knowledge and full bliss and in association with the Supreme Personality of Godhead Himself, Lord Krishna.
 A. C. Bhaktivedanta Swami Prabhupada
One who loves Krishna will give Him whatever He wants, and he avoids offering anything which is undesirable or unasked for. Thus, meat, fish and eggs should not be offered to Krishna...Vegetables, grains, fruits, milk and water are the proper foods for human beings and are prescribed by Lord Krishna Himself. Whatever else you eat, can not be offered to Him, since He will not accept it.
 A. C. Bhaktivedanta Swami Prabhupada
In spiritual life, one must conduct one's whole life under the guidance of the guru. Only one who executes his spiritual life under the direction of the spiritual master can achieve the mercy of Krishna.
 A. C. Bhaktivedanta Swami Prabhupada
There is a word Kristos in the Greek dictionary, and this word is supposed to be borrowed from the Sanskrit word "Krishna," and Christ is derived from Kristos.
 A. C. Bhaktivedanta Swami Prabhupada