Maharajji Kripalu writes that the sixth of the seven steps to God realization is purification: complete purification of the heart.

How does one purify the heart, and why is this important?

Maharajji Kripalu instructs that humble and constant devotions are the way to purify one's heart. Through this gradual process of purification, confidence grows and one will begin to feel the closeness of Radha Krishn. With closeness, longing for Divine vision increases. A time will come when all the worldly attractions cease to exist in one's mind and all that will remain is love and an intense selfless longing God at all time, synonymous with Divine visions. This is the state of heart purification, desirable because one can move beyond the world of illusory happiness to a more eternal state of being and communion.