Authors:

They get up early, because they have so much to do, and go to bed early, because they have so little to think about.

Oscar Wilde, Russell Jackson, Joseph Bristow, Ian Small (2000). “The Complete Works of Oscar Wilde: The picture of Dorian Gray : the 1890 and 1891 texts”, p.315, Oxford University Press on Demand
They get up early, because they have so much to do, and go to bed early, because they have so little to think about.