"Krishna says, man-mana bhava mad-bhakto mad-yaji mam namaskuru, mam evaisyasi asamsayah. Four things. 'Just always think of Me,' man-mana. Mad-bhaktah: 'Just become My devotee.' Mad-yaji: 'You worship Me. And offer your obeisances unto Me. If you do simply these four things, then you are coming back to Me without any doubt.' These four things. But they cannot do it or will not do it. Otherwise, very simple. We are thinking of something always. Simply we have to replace Krishna. No. They’ll think so many other things except Krishna. This is the difficulty. Otherwise, it is not at all difficult. Man-mana bhava mad-bhakto mad-yaji mam namaskuru. This is Krishna consciousness."
(Srila Prabhupada morning walk, June 9, 1974, Paris, France)
(*Sri Sri Radha Karuna-sindu are the presiding Deities of Bhakta dasa and Bhakti devi dasi's home in Australia.)