The basic principle of the living condition is that we have a general propensity to love someone. No one can live without loving someone else. This propensity is present in every living being. Even an animal like a tiger has this loving propensity at least in a dormant stage, and it is certainly present in the human beings. The missing point, however, is where to repose our love so that everyone can become happy. At the present moment the human society teaches one to love his country or family or his personal self, but there is no information where to repose the loving propensity so that everyone can become happy. That missing point is Krsna, and The Nectar of Devotion teaches us how to stimulate our original love for Krsna and how to be situated in that position where we can enjoy our blissful life.
In the primary stage a child loves his parents, then his brothers and sisters, and as he daily grows up he begins to love his family, society, community, country, nation, or even the whole human society. But the loving propensity is not satisfied even by loving all human society; that loving propensity remains imperfectly fulfilled until we know who is the supreme beloved. Our love can be fully satisfied only when it is reposed in Krsna. This theme is the sum and substance of The Nectar of Devotion, which teaches us how to love Krsna in five different transcendental mellows.