In literature the word “infidel” has been wielded with a remarkable range of connotations—from an outright pejorative label for religious nonconformity to a more nuanced, even ironic, description of dissenting beliefs or unconventional behaviors. In works such as Thomas Carlyle’s historical narrative ([1]) and Marlowe’s drama ([2]), it is used to condemn those who deviate from accepted dogmas or display rebellious attitudes toward dominant power structures. Meanwhile, authors like Fyodor Dostoyevsky ([3], [4], [5]) and Mark Twain ([6], [7], [8], [9]) invoke the term in more personal or morally ambiguous contexts, often reflecting inner conflict or societal prejudice. At times, “infidel” appears to highlight the clash between rigid institutions and the diversity of human thought, making it a versatile literary device across genres and eras ([10], [11], [12]).