Final answer:
The biblical allusion in the King's soliloquy likely refers to the Old Testament stories, particularly those involving divinely anointed but flawed kings such as King David, and the theme of 'An eye for an eye,' which relates to the King's understanding of his own guilt and inevitable divine justice.
Step-by-step explanation:
The biblical allusion implied in the King's soliloquy in Act 3, Scene 3, refers to the themes of guilt, justice, and the divine right of kings, which are common motifs in religious texts. For instance, the soliloquy might evoke the story of King David, who despite his righteousness, was also culpable of serious sins. The allusion to Old Testament themes of responsibility and divine justice, as in the law of "An eye for an eye," reflects on the King's recognition of his own guilt and the inevitability of divine retribution.
The scene not only underscores the King's internal conflict but also leverages the audience's knowledge of biblical stories, such as the fate of Saul and the wisdom of Solomon, to amplify the dramatic tension. The King suffers in recognition of his crimes, much like King Herod who is depicted in the painting "Herod's Banquet" as dejected after ordering John the Baptist's beheading at Salome's behest. This intertwining of biblical references and the King's plight helps the audience to purge their own feelings of pity and fear in a cathartic process.