A disciple serves the spiritual master with the sole purpose of getting instructions from him.
A. C. Bhaktivedanta Swami PrabhupadaA spiritual master who is one hundred percent Krishna conscious is the bona fide spiritual master.
A. C. Bhaktivedanta Swami PrabhupadaOur first duty is to satisfy the spiritual master, who can arrange for the Lord's mercy. A common man must first begin to serve the spiritual master or the devotee. Then, through the mercy of the devotee, the Lord will be satisfied. Unless one receives the dust of a devotee's lotus feet on one's head, there is no possibility of advancement. Unless one approaches a pure devotee, he cannot understand the Supreme Personality of Godhead.
A. C. Bhaktivedanta Swami PrabhupadaFirst 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 PrabhupadaThe spiritual master and Krishna are two parallel lines. The train, on two tracks, moves forward. The spiritual Master and Krishna are like these two tracks. They must be served simultaneously. Krishna helps one to find bona fide Spiritual Master and bona fide Spiritual Master helps one to understand Krishna. If one does not get bona fide Spiritual Master, then how he can ever understand Krishna ? You cannot serve Krishna without Spiritual Master, or serve just Spiritual Master without serving Krishna. They must be served simultaneously.
A. C. Bhaktivedanta Swami Prabhupada