When writing a formal letter you should introduce yourself to the recipient

What effect is achieved by the use of the phrase "as the devil would have it" in the second sentence?

Laugh and be merry, remember, better the world with a song,    better the world with a blow in the teeth of a wrong.    laugh, for the time is brief, a thread the length of a span.    laugh and be proud to belong to the old proud pageant of man. (laugh and be merry/john masefield/public domain) which of these is the main idea of the poem?

To meet the needs of commuters in the industrial age, city planners implemented the use of phonographs. provided more horses and carriages. borrowed technology from railroads. constructed new telephone lines.