You have said rightly when you write that the devotees are working to please me by distributing my books. My mission on behalf of my guru maharaj and Lord Caitanya, to spread Krsna Consciousness would never have been so successful if it had not been taken up by enthusiastic boys and girls such as in San Francisco, especially through distribution of books.

From Srila Prabhupada’s letter to Bhakta dasa – 28 June, 1974