From Back to Godhead
What is the effect of chanting Hare Krishna?
The names of the Lord in the maha-mantra Hare, Krishna, and rama are invested with His full potencies. Singing God’s names, therefore, is to contact Him through the medium of transcendental sound. Thus, the effect of chanting is the same as the effect of directly associating with the Lord. The following beautiful verse, written by Lord caitanya, describes the seven effects the Hare Krishna mantra has on chanters.
ceto-darpana-mar
