Krishna Consciousness means practical living, not something utopian or idealistic and vague. We simply do the needful, whatever pleases Krishna most, that's all. Gradually you will understand what it means to please Krishna and what it means to displease Krishna. That you will learn by studying our books and by yourself engaging in practical devotional service.

(From Srila Prabhupada's letter to Yajnesvara  —  Bombay 2 January, 1972)