《神曲》敘述但丁本人遊歷地獄、煉獄以及天堂的旅程[4],描寫人死後的情況與神聖正義的獎懲[5]。但丁的行程象徵人對上主的皈依:首先是地獄,象徵「認罪」;其次是煉獄,象徵基督徒的「悔改」;最後是升至神前的天堂[6]。但丁借鑑了中世紀天主教神學思想,特別是多瑪斯·阿奎那《神學大全》(Summa Theologica)的托馬斯主義基督教哲學[7],因此《神曲》又被稱為「韻文大全」(Summa in verse)[8]。埃里希·奧爾巴赫認為但丁首創將人類描述為特定時間、地點和環境的產物,人類從此跳脫出神話原型,抑或惡習與美德的集合體。《神曲》的想像世界開創了現代小說的寫實主義和自我描摹傳統。[9]
^For example, Encyclopedia Americana, 2006, Vol. 30. p. 605: "the greatest single work of Italian literature;" John Julius Norwich, The Italians: History, Art, and the Genius of a People, Abrams, 1983, p. 27: "his tremendous poem, still after six and a half centuries the supreme work of Italian literature, remains – after the legacy of ancient Rome – the grandest single element in the Italian heritage;" and Robert Reinhold Ergang, The Renaissance, Van Nostrand, 1967, p. 103: "Many literary historians regard the Divine Comedy as the greatest work of Italian literature. In world literature it is ranked as an epic poem of the highest order."
^Peter E. Bondanella, The Inferno, Introduction, p. xliii, Barnes & Noble Classics, 2003, ISBN1-59308-051-4: "the key fiction of the Divine Comedy is that the poem is true."
^Vallone, Aldo. "Commedia" (trans. Robin Treasure). In: Lansing (ed.), The Dante Encyclopedia, 181-84.