What are Thorin's last words? why are they important? what gestures do bard and elvenking make at his burial

Thorin's last words are,

“There is more in you of good than you know, child of the kindly West. Some courage and some wisdom, blended in measure. If more of us valued food and cheer and song above hoarded gold, it would be a merrier world.”

These sentiments echo the futility of greed and pay tribute to the simple Hobbit way of life.

The Elven King laid Ochrist, the Elvish sword that had been taken from Thorin during captivity. The Bard laid the Arkenstone upon Thorin's breast.