Simply by chanting the Hare Krishna mantra one revives his original relationship with God.
Srimad Bhagavatam 7.7.39,
Just by chanting the holy names of Lord Krishna, all inauspiciousness disappears.
We Should know in perfect consciousness that human life is bestowed upon the conditioned soul to achieve spiritual success and the easiest possible procedure to attain this end is to chant the holy name of the Lord. – Srimad Bhagavatam, 02.01.12.
Krishna is present fully in His holy name and this is realized by the humility and sincerity in our chanting.
Caitanya Mahaprabhu has recommended that everyone chant the Hare Krishna mantra just to cleanse the dust from the heart. If the dust of the heart is cleansed away, then one can actually understand the importance of the holy name.
Nectar of Devotion, Chapter 12,