Srila Prabhupada murti and vyasasana, Hare Krishna Land, Mumbai, India
"Srila Visvanatha Cakravarti Thakura instructs us, in his famous prayers for the spiritual master, as follows:
yasya prasada bhagavat-prasado yasyprasadanna gatih kuto pi dhyayam stuvams tasya yasas tri-sandhyam vande guroh sri-caranaravindam
'By satisfaction of the spiritual master, the Supreme Personality of Godhead becomes satisfied. And by not satisfying the spiritual master, there is no chance of being promoted to the plane of Krsna consciousness. I should, therefore, meditate and pray for his mercy three times a day, and offer my respectful obeisances unto him, my spiritual master.'"
(Bhagavad-gita As It Is, 2.41, Purport)