"The Lord's names are considered in exactly the same way; since the Lord is absolute, His name, His form, His pastimes, His paraphernalia and His quality all have the same potency. In the absolute world, the name Krsna is the transcendental sound representation of the Lord. There is no potential difference between His quality, name, form, etc. If we chant the name of the Lord, Hare Krsna, that has as much potency as the Lord Himself. There is no potential difference between the form of the Lord whom we worship and the form of the Lord in the temple. One should not think that one is worshiping a doll or statue of the Lord, even if others consider it to be a statue. Because there is not potential difference, one gets the same result by worshiping the statue of the Lord or the Lord Himself. This is the science of Krsna consciousness."

Srimad-Bhagavatam 3:21:32 Purport
Bhaktivedanta Book Trust. HDG A.C. Bhaktivedanta Swami Srila Prabhupada.

hari haraye namah krsna yadavaya namah
yadavaya madhavaya kesavaya namah

gopala govinda rama sri-madhusudana
giridhari gopinatha madana-mohana

Nama-sankirtana Song by Srila Narottama Dasa Thakura

Lord Caitanya Mahaprabhu taught his students to understand Lord Krsna by always chanting the Holy Names. Singing the names of Krsna and clapping His hands, He began His nama-sankirtana movement. The names He sang are the first two lines of this song, and Narottama Dasa Thakura and others have placed these names in the beginning of their writings to immortalize these events.