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.
From the nearly defunct line of the Númenorian Lords of Andúnië (including Elendil and Isildur), Aragorn will rise to rule men. 
 As well as representing Aragorn himself, the fire also invokes an image of the forge which will remake Narsil.