Why does the author refer to definition of idol from ancient history?

By referencing the ancient definition of an idol, the author aims to highlight the enduring nature of idolatry and its relevance to contemporary society. The ancient definition of an idol as an object of worship that is not divine serves as a reminder that humans have a long history of placing their trust and devotion in things other than God. Referring to this historical definition allows the author to draw connections between the idolatry of the past and present and emphasize the lessons that can be learned from humanity's enduring struggle with this issue. It adds depth and historical context to the discussion of idolatry, underscoring its significance as a fundamental aspect of human behavior.