Although unfinished, it is "one of the classics of the history of philosophy and one of the most influential works of Western literature." Moreover, the "Summa" remains Aquinas' "most perfect work, the fruit of his mature years, in which the thought of his whole life is condensed." Among non-scholars, the "Summa" is perhaps most famous for its five arguments for the existence of God, which are known as the "five ways" (). The five ways, however, occupy only one of the "Summa"'s 3,125 articles.