托尔金透露，我们的个性依靠我们的行为质量。向外行为表现出内在的信念，无论是好还是病。 “从他内心的善行中的好人产生了善良，而邪恶的人是从邪恶的宝藏中产生邪恶的；因为他的嘴里有丰富的内心说话” {路加福音6:45}。
(Tolkien reveals that our personalities take on the quality of our acts. Outward behavior manifests inward convictions, whether for good or ill. "The good man out of the good treasure of his heart produces good, and the evil man out of his evil treasure produces evil; for out of the abundance of the heart his mouth speaks" {Luke 6:45}.)