Prabhupada: So in the Western countries, their brain is not so sharp to clearly understand the difference between visistadvaita, advaita-dvaita, dvaitadvaita, or advaita. (laughs) Their brain does not allow to think very deeply about… So we are simply teaching them, man-mana bhava mad-bhakto mad-yaji mam namaskuru [Bg. 18.65]. That includes all philosophy. In this way we are preaching all over the world and there is little response. We are selling our books very nicely. So our main purpose is to spread Krsna consciousness.

(Conversation with Pandita from Tirupati — August 24, 1976, Hyderabad)