Only an empowered personality can distribute the holy name of the Lord and enjoin all fallen souls to worship Krishna. By distributing the holy name of the Lord, he cleanses the hearts of the most fallen people. Therefore he extinguishes the blazing fire of the material world. Not only that, he broadcasts the shining brightness of Krishna's effulgence throughout the world. Such an acarya, or spiritual master, should be considered nondifferent from Krishna that is, he should be considered the incarnation of Lord Krishna's potency.
Worship of The Lotus Feet of The Spiritual Master: There is no work as auspicious as serving the spiritual master. Of all worship, the worship of the Supreme Personality of Godhead is the greatest but the worship of the lotus feet of the spiritual master is even greater than the worship of the Supreme Personality of Godhead. Unless this is firmly realized we cannot understand what saintly association means, we cannot understand what the shelter of a spiritual master means, we cannot understand that we are dependent and he is our maintainer.