Mahanidhi Madan Gopal Das
It is wrong to think that the unparalleled results of chanting harinama are exaggerations given to induce people to take up chanting. The holy name is completely independent and self-manifest. He does not depend on anything to manifest His splendor, so there is no question of any exaggeration in regards to His glories. The tiny human brain cannot even ascertain the actions of material mantras, herbs and healing stones, so how can it possibly perceive the inconceivable power of transcendental sound vibration.
Therefore, one should not doubt or disbelieve the glories of harinama. Sooner or later the faithful devotee will personally experience the marvelous results of chanting Kṛṣṇa’s name. The results are like seeds that fructify in due course of time. Success in chanting depends on two factors: 1) The mercy of Kṛṣṇa. 2) A sincere endeavor to avoid aparadha.
Fifth Offense: Rectification
One who is guilty of minimizing the glories of the holy name should humbly approach learned Vaisnavas, and attentively hear about Sri Kṛṣṇa’s qualities and pastimes. Full of regret, one should admit his offense, and remove his doubts by receiving proper knowledge regarding nama-tattva. The gentle devotees will then forgive the offender with compassionate embraces, and bless him with spiritual strength.
An excerpt from the book Art of Chanting.