Prabhupada Was Not Obliged 

The Krsna Book describes the spiritual master as a waterfall, which sometimes flows in the rainy season and sometimes is still.  When I asked Prabhupada what this meant, he said that the spiritual master is not obliged to speak.  When he feels inspired, he will speak to his disciple in a relevant way.  He will not give the disciple information he is not ready to receive.  But he never handles his disciple roughly.  He is interested in the disciple’s welfare, and therefore, he’s willing to teach Krishna consciousness according to the disciple’s needs.

Prabhupada was like this.  He was not obliged.  The fact that he did not speak so much Vrindavana krishna-katha was his mercy, his expertise.  At the same time, he gave everything, including knowledge of krishna-lila, caitanya-lila, and the foundational wisdom of the Lord’s talks with Arjuna in the Bhagavad-gita.