Devotee: Śrīla Prabhupāda, if we think about our spiritual master, is that as good as thinking about Kṛṣṇa?
Devotee (2): If we think about our spiritual master, is that as good as thinking of Kṛṣṇa?
Prabhupāda: Yes, because it is said, yasya prasādād bhagavat-prasādaḥ: "If you can please your guru, then you please Kṛṣṇa." So if you make always this plan, "How to please my guru," then you'll please Kṛṣṇa. What is that?
Devotee (3): Śrīla Prabhupāda, it is said in the Bhagavad-gītā that if one thinks in the time of death, if he thinks of Kṛṣṇa, he goes to Kṛṣṇa. What if one thinks of his spiritual master?
Prabhupāda: He will go to Kṛṣṇa, because spiritual master is also going to Kṛṣṇa.
(Srila Prabhupada Lecture, Nairobi, October 28, 1975)
"And to answer your last question, where will I go at the time of death if I am thinking of my spiritual master? You will go to Him just as Krsna says in Bhagavad-gita chapter 8-9 that whatever we are thinking about at the time of death—we shall attain to that nature without fail."
(Srila Prabhupada Letter, January 1, 1972)