The sound vibration of the Hare Krishna mantra, although presented in the ordinary alphabet, should not be taken as mundane or material.
Srimad bhagavatam 4.9.4,
Anyone who makes a gift of this great work "Srimad – Bhagavatam" on a full moon day attains to the highest perfection of life by returning to Godhead.
The Lord’s glance is the original cause of material creation.
Srimad Bhagavatam 9.5.5,
Everyone is seeking Krishna, for He is the Supersoul of all individual souls.
Srimad Bhagavatam 10.9.21,
The spirit soul can be happy only in the association of the supreme living being, the Personality of Godhead, and nowhere else.
Srimad Bhagavatam 3.2.11,
Hare Krishna, Hare Krishna, Krishna Krishna, Hare Hare/ Hare Rama, Hare Rama, Rama Rama, Hare Hare. In Kali-yuga, if this Vedic maha-mantra is chanted regularly and heard regularly by the devotional process of shravanam kirtanam, it will purify all societies, and thus humanity will be happy both materially and spiritually.
Srimad Bhagavatam 4.18.14,