"Piping down the valleys wild Piping songs of pleasant glee On a cloud I saw a child. And he laughing said to me. Pipe a song about a Lamb; So I piped with merry chear, Piper pipe that song again-- So I piped, he wept to hear. Drop thy pipe thy happy pipe Sing thy songs of happy chear, So I sung the same again While he wept with joy to hear Piper sit thee down and write In a book that all may read-- So he vanish'd from my sight. And I pluck'd a hollow reed. And I made a rural pen, And I stain'd the water clear, And I wrote my happy songs Every child may joy to hear. - "Introduction to the Songs of Innocence"