Bhaktisiddhanta Sarasvati quotes:

A bonafide spiritual master is non-different from Supreme Personality of Godhead. If one cannot say that the spiritual master is the personal manifestation of the Supreme Personality of Godhead, one will not be able to utter the holy name of the Lord.

If we take shelter of the lotus feet of the spiritual master, we can become free from illusion, fear and distress. If we wholeheartedly beg for his mercy without any deceit then the spiritual master bestows all auspiciousness upon us.

In this world of Maya, which is averse to the Lord, full of trials and tribulations, only patience, humility and respect for others are our friends for Hari bhajana.

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.

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.