“The Catcher in the Rye” by J. D. Salinger: Holden Caulfield’s Bible favorite, after Jesus, is Legion, who is popularly seen as having multiple personality.

“If you want to know the truth, the guy I like best in the Bible, next to Jesus, was that lunatic and all, that lived in the tombs and kept cutting himself with stones” (1, p. 111).

The above may be Holden’s self-diagnosis of multiple personality.

Here is his biblical reference and its interpretation in popular culture:

Mark 5:1-13

“They came to the other side of the sea, to the country of Gerasenes. And when he had come out of the boat, there met him out of the tombs a man with an unclean spirit, who lived among the tombs…Night and day among the tombs and on the mountains he was always crying out, and bruising himself with stones. And when he saw Jesus from afar, he ran and worshipped him…And Jesus asked him, ‘What is your name?’ He replied, ‘My name is Legion; for we are many’…And the unclean spirits came out, and entered the swine; and the herd, numbering about two thousand, rushed down the steep bank into the sea, and were drowned in the sea.”

Legion in popular culture: https://en.wikipedia.org/wiki/Legion_in_popular_culture  For example, in Marvel Comics: “David Charles Haller / Legion is the name of Charles Xavier’s son in X-Men. He’s a mutant suffering from Multiple Personality Disorder (now called Dissociative Identity Disorder), with each personality possessing a different power, thus being ‘one and many.’ ”

1. J. D. Salinger. The Catcher in the Rye [1951]. New York, Little Brown, 2014.