"The Man of Adamant" is a short story written by Nathaniel Hawthorne. Richard Digby, who believes his philosophy on life is the correct one, refuses to share his ideas with anyone else. His heart ails from accretions of calculous. He leaves his home, deciding to become a hermit. In the wilderness he discovers a cave and decides to make it his new home, a place where he can meditate. Water dripping from the roof, over time, has created forms of adamant within the cave. Digby decides not to drink from a nearby fountain; instead, he drinks the water dripping from the roof.