Most people do not have a very active awareness or strong cognizance of God. Their minds may wander to different things semi conscious but they are not really using their intellect. The more a person trains himself/herself to contemplate and confront the reality of God, in measurements of time and depth, the more the mind will learn to demand it's usage. Therefor when the aspiring devotee falls from his quest, the mind and heart will still demand their learned attention, and having fallen from holy pursuits the person will be faced with new and more ardent desires and bad thoughts. When the person teaches himself to be able to find God even at those times, to subdue and channel his mind and heart correctly and faithfully even in the lack of holy desire and devotion, he will be ready to forge even greater vessels, opening his heart and mind to be even more attentive and relentless.
Na Nach Nachma Nachman MeUman gives a person the strength to ride the waves of this process, and to come out on top.
Great blessings of Na Nach Nachma Nachman MeUman!