"It is very simple. Hare means, 'O energy of the Lord,' and Krsna means, 'O Lord Krsna.' Just as there are males and females in the material world, similarly, God is the original male (purusa), and His energy (prakriti) is the original female. So, when we chant Hare Krsna, we are saying, 'O Lord Krsna, O energy of Krsna, kindly engage me in Your service.'"
(Science of Self-Realization, Chapter 1)
.
.