Why does the writer refer to the 'early to bed...' principle?
A recent survey conducted in India shows that twenty-nine percent of Indians sleep only after midnight and sixty-one percent sleep for seven hours or less. The survey also arrived at a conclusion that Indians are among the world's earliest risers, with sixty-four percent getting out of bed before 7 a.m. By using this phrase, the writer wants to show that ‘early rise’ is a good habit only if the principle of ‘early to bed’ is followed.