Chanting is glorifying Krishna.
We are in this body and we are not this body, this is the lesson number 1 taught by the Bhagvad Gita.
Chanting of Hare Krishna is tapa, this japa is tapa, this japa is yagya, this japa is archana this japa is dhyana.
As we chant the Holy name of the Lord; it is compared to the shooting arrows, our body is the bow and our soul is the arrow and then the target the Supreme destination is Lords lotus feet. Thus our chanting must be very attentive.
The 12th offense is to have cell phones next to you while chanting and hearing.