Truly Tolkien was a master of poetry and prose, and indeed very often his prose is poetry.
From the Return of the King, after the Ring has been destroyed:
"A great Shadow has departed," said Gandalf, and then he laughed, and the sound was like music, or like water in a parched land; and as he listened the thought came to Sam that he had not heard the pure sound of merriment, for days upon days without count. It fell upon his ears like the echo of all the joys he had ever known. But he himself burst into tears. Then as a sweet rain will pass down a wind of spring and the sun will shine out the clearer, his tears ceased, and his laughter welled up, and laughing he sprang from his bed. "I feel like spring after winter, and sun on the leaves; and like trumpets and harps and all the songs I have ever heard!"
And here another selection from the same, when Frodo and Sam are presented to Aragorn for the first time after the Ring has been destroyed and a minstrel sings to those present about the great things which had been done:
And he sang to them, now in the Elven-tongue, now in the speech of the West, until their hearts, wounded with sweet words, overflowed, and their joy was like swords, and they passed in thought out to regions where pain and delight flow together and tears are the very wine of blessedness.