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 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 PrabhupadaThe Lord has different names according to His different activities. For example, His name is Madhusรผdana because He killed the demon of the name Madhu; His name is Govinda because He gives pleasure to the cows and to the senses
A. C. Bhaktivedanta Swami Prabhupada