Thinking about the Poem
Look at these words;
... peace comes dropping slow
Dropping from the veils of the morning to where the cricket sings
What do these words mean to you? What do you think “comes dropping
slow...from the veils of the morning”? What does “to where the cricket sings”

The given lines indicate that peace of mind can be slowly acquired from the natural surroundings. 
It is peace that “comes dropping slow...from the veils of the morning”.
The phrase “to where the cricket sings” indicates a peaceful place where one can hear the vibrant sounds of nature− sounds such as the songs of the crickets at the time of dawn.