The holy name of Krishna has extraordinary spiritual potency because the name of God is nondifferent from God Himself.
Sri Namamrita – The Nectar of the Holy Name,
What is the power of Lord’s name ? The process of chanting the holy name of the Lord is so powerful that by this chanting even householders can very easily gain the ultimate result achieved by persons in the renounced order.
Even the very sound of the holy name of Lord Krishna or Rama can at once surcharge the atmosphere spiritually.
If we hear properly, the holy name will enter through our ears into the region of our heart and shower down nectar. When we are lost in the ocean of nectar, we will see Krishna.
One who chants the holy name of the Lord is immediately freed from the reactions of unlimited sins, even if he chants indirectly [to indicate something else], jokingly, for musical entertainment, or even neglectfully. This is accepted by all the learned scholars of the scriptures.
Srimad Bhagavatam 6.2.14,