The old that is strong does not wither". By the time of the War of the Ring, Aragorn II Elessar was 87 years old. Any common man of that age would be 'withered' but because his veins ran with the royal blood of Númenorean Ship-kings, Aragorn II Elessar was in the prime of his life. He was destined to live for over two centuries before passing away, still sound of mind.