(Srila Prabhupada instructing his disciples in the Radha-Damodar courtyard, 1972)
"The word guru-prasada indicates that the spiritual master is very merciful in bestowing the boon of devotional service upon the disciple. That is the best possible gift the spiritual master has to offer. Those with a background of pious life are eligible to receive life's supreme benefit, and to bestow this benefit, the Supreme Personality of Godhead sends His representative to impart His mercy. Endowed with the mercy of the Supreme Personality of Godhead, the spiritual master distributes the mercy to those who are elevated and pious. Thus the spiritual master trains his disciples to render devotional service unto the Supreme Personality of Godhead. This is called guru-krpa. It is krsna-prasada, Krishna's mercy, that He sends a bona fide spiritual master to the deserving disciple. By the mercy of Krishna, one meets the bona fide spiritual master, and by the mercy of the spiritual master, the disciple is fully trained in the devotional service of the Lord."