The holy name of Lord Krsna is the sweetest of all sweetnesses and the most auspicious of all auspiciousness. It is completely spiritual, and it is the transcendental fruit of all Vedic literature. If an ordinary human being chants the holy name of Krsna even only once with faith, or even in the spirit of mocking Him, the holy name will deliver the chanter from the bondage of repeated birth and death.

(Skanda Purana, Prabhasa-khanda (Quoted in Jiva Gosvami's Tattva sandarbha, 15.4))
No knowledge is a pure as the holy name of the Lord. No vow is as powerful as the holy name. No meditation in the world is like the holy name. No philosophy brings a result like the holy name. No renunciation is greater than the holy name . Nothing will ever be equal to the holy name.

(Srila Haridasa Thakura Sri Hari-nama-Cintamani 8.4-6)