Devotee: You said that if we are performing some activity, that activity must be tested to see if Lord Kṛṣṇa is pleased. But what is the test?
Prabhupada: If the spiritual master is pleased, then Kṛṣṇa is pleased. That you are singing daily: yasya prasādād bhagavat-prasādo yasyāprasādān na gatiḥ kuto 'pi. If the spiritual master is pleased, then Kṛṣṇa is pleased. That is the test. If he is not pleased, then he has no other way.
That is very simple to understand. Suppose anyone who is working in the office, the immediate boss is the head, head clerk or the superintendent of that department. So everyone is working. If he satisfies the superintendent or the head clerk, then it is to be understood that he has satisfied the managing director. It is not very difficult. Your immediate boss, representative of Kṛṣṇa, he is to be satisfied. Yasya prasādād bhagavat-prasādo yasya.
Therefore the guiding of spiritual master is required. Kṛṣṇa comes in the form of spiritual master to guide. That is stated in the Caitanya-caritāmṛta. Guru-kṛṣṇa-kṛpāya. Guru-kṛṣṇa-kṛpāya. So guru-kṛpā, mercy of guru, is mercy of Kṛṣṇa. So when both of them are satisfied, then our path is clear. Guru-kṛṣṇa-kṛpāya pāya bhakti-latā-bīja (CC Madhya 19.151). Then our devotional service is perfect. So you did not mark this statement in the Gurvaṣṭaka?
Prabhupada: Yasya prasādād bhagavat-prasādo yasyāprasādān na gatiḥ kuto 'pi. Just like this movement. This movement was started only for the satisfaction of my spiritual master. He wanted. Caitanya Mahāprabhu wanted that this movement should be spread all over the world. So he ordered many of my Godbrothers and desired... Even not ordered; he wanted. He sent some of my Godbrothers to the foreign countries to spread, but some way or other, he was not very successful. He was called back. So I thought, "Let me try in this old age."
So the only desire was to satisfy the desire of the spiritual master. So you have helped now. It is coming to be successful. And this is yasya prasādād bhagavat-prasādaḥ. If we actually sincerely work under the direction of the spiritual master, that is satisfaction of Kṛṣṇa, and Kṛṣṇa will help you any way.
(Srila Prabhupada Lecture, Delhi, November 3, 1973)