The Road goes ever on and on ...

When Bilbo finally heads off for Rivendell after his 'Long-expected Party' he sings this song:

The Road goes ever on and on,
Down from the door where it began.
Now far ahead the Road has gone,
And I must follow, if I can,
Pursuing it with eager feet,
Until it joins some larger way
Where many paths and errands meet.
And whither then? I cannot say.