"Not all those who wander are lost,..." (J. R. R. Tolkien)

"All that is gold does not glitter,
Not all those who wander are lost;
The old that is strong does not wither,
Deep roots are not reached by the frost.

From the ashes a fire shall be woken,
A light from the shadows shall spring;
Renewed shall be blade that was broken,
The crownless again shall be king."

SOURCE: "The Fellowship of the Ring" - "The Lord of the Ring" (J. R. R. Tolkien)

According to Wikipedia, "the poem appeared twice in the 'The Lord of the Rings' in the first book, 'The Fellowship of the Ring.' First in Gandalf's letter, when the four hobbits arrive to the Prancing Pony Inn at Bree, before they know Aragorn / Strider, the subject of the verse. It is repeated by Bilbo at the Council of Elrond, and he whispers to Frodo that he wrote it many years before, when Aragorn first revealed who he was."