Despair not! For though dark they stand,
All woods there be must end at last,
And see the open sun go past:
The setting sun, the rising sun,
The day's end, or the day begun.
For east or west all woods must fail.
The Fellowship of the Ring
If anyone has the book at hand, this sounds like it's missing a line or so (I found it online), but I might be just misremembering how it sounds.