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 old that is strong does not wither” refers to the time of the War of the Ring, when Aragorn was eighty-seven years old due to the special blood of the Númenorean Ship-kings that ran in his veins. He was meant to live for over two hundred years before dying, so he was in his prime. 
 “Deep roots are not reached by the frost” refers to the fact that the line of Isildur survives the fall of Arnor, the north kingdom of the Dunedain, to the Witch-King of Angmar. 
