Notice the differing line lengths of the stanzas and the shift in thought from stanza to stanza.

The poet beautifully designed the length of lines and thoughts in every different stanza keeping the parent thought of keeping quiet same in each.

The first stanza, the poet tells us to be quiet and not say any word in any language.

The second stanza, how exotic will be to be in an environment where there is no rusty sound of engines and machines.

The third stanza, fishermen will not hurt the aquatic life and people gathering salt will take a moment to see their wounded hands.

Fourth stanza, army men, and other people indulge in the violence of any kind must stop and talk together with their family.

The fifth stanza, poet states silence should not be confused total inactivity and human shouldn't threaten himself with death.

The sixth stanza, Earth is itself prime example of Apparent stillness doesn't mean death.

This fascinating shift in thought takes every major aspect of an effective working environment and poet suggests all of it count till 12 and keep quiet.