Literally, enlightenment is to enlighten ignorance, oppose ignorance and advocate cultural education, but in essence, enlightenment is to enlighten the political and ideological system of bourgeois revolution, thus putting forward a whole set of philosophical theories, political programs and social reform programs, demanding the establishment of a society based on "rationality" They opposed tyranny with political freedom, religious oppression with freedom of belief, destroyed Catholic authority and religious idols with deism and atheism, opposed the view of "divine right of monarchy" with the slogan of "natural human rights" and opposed the hierarchical privilege of nobles with "equality before the law", thus establishing bourgeois regime.