Traditional nursery rhyme. Possibly with buddhist overtones (see http://www.mind.net/music/row.html) .
Row, row, row your boat
Gently down the stream
Merrily, merrily, merrily, merrily
Life is but a dream.
Silly and simple, I know, yet absent from Everything until just now, and linked to by The Nursery Rhyme Metanode.