The 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 PrabhupadaThe highest summit of spiritual perfection is knowledge of the Supreme Personality of Godhead.
A. C. Bhaktivedanta Swami PrabhupadaIn the last stage of the spiritual master's life, the devotees of the spiritual master should take preaching activities into their own hands. In this way the spiritual master can sit down in a solitary place and render nirjana-bhajana.
A. C. Bhaktivedanta Swami PrabhupadaA bona fide spiritual master, under the guidance of authorities, can turn anyone to the Vaisnava cult so that naturally he may come to the topmost position of a brahmana.
A. C. Bhaktivedanta Swami PrabhupadaOne 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