Lord of the rings fans, can someone "translate" this?

[MochaDuck]

"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."—J.R.R. Tolkien

Does anyone know exactly what this poem means? I know I'd describing Aragorn, and I think I kinda get the last two lines; but what does the rest mean?
Thanks all

 

[Eggscaping]

Aragorn looked a bit scruffy and dubious when he was first encountered by Frodo, not at all "shining and golden" as a king might be expected to be. He was a wanderer of the wastelands, but he wasn't wandering because he was lost, he was protecting the land and its inhabitants. There were many inhabitants of Middle Earth that were old, but maintained their strength - waiting for their time to strike at evil. The elves, for instance, had the strength - the quiet, ancient strength - to abide. Treebeard was very old, but had not lost his strength and his anger merely needed to be rekindled to turn him into a very potent weapon against Saruman. His 'roots' went very deep but had not been destroyed by the creeping frost of evil.
From the ashes a fire shall be woken can refer to several things. The renewed desire to fight Sauron rising from centuries of almost forgetting about things like the One Ring and all the races joining together to join in and support the Fellowship, for instance. The light that sprang from the shadows shall spring once again means Aragorn stepping forward to take his place as the king...which is what the last two lines mean. Aragorn was the heir to the throne, but was uncrowned, but once the shattered sword was reforged and renewed, he had a focus - and had regained the will to once again claim his place as king.
Those are my thoughts, anyway though it's been decades since I reread the whole trilogy.

 

[Acre4Me]

I am sitting next to a Tolkien fan.

Suggests you read the Silmarillion (by Tolkien) This book gives the history of Middle Earth-a lot of the backstory.

Old, and deep roots.. Aragorn is very old (in movie remember he states he is 90, but of course looks much younger). This is in part due to his Elvish ancestors (deep roots). Elros, the brother of Elrond, is Aaragorns ancestor. Both Elros and Elrond had a choice to have the “light of the Valor” which gave them the elvish immortality (they endure forever), or to have the gift of man (specific life span). Remember the elves in movie were leaving middle earth to go to Valinor (?) where they endure forever. A select few other non-elves went to Valinor too - the ring bearers, Bilbo and Frodo went there (this fact is in the appendices of the LOTR books). In the movie, a very aged Bilbo gets on the boat to Valinor with Elrond.

Ok...fan is giving me too much info to add -and too tired to type it, but it all relates to Aragorn and his past (lineage) and future