Why does Virgil leave Dante at the summit of Purgatory?

In The Divine Comedy, Virgil serves as Dante’s guide through Hell and Purgatory, representing the limits of human reason and classical wisdom.1

Virgil leaves Dante at the summit of Purgatory because he is a pagan and therefore cannot enter Paradise, which requires the divine grace and theological insight provided by Beatrice. While Virgil successfully leads Dante through the moral rehabilitation of Purgatory, he is ultimately insufficient for the final stage of the journey. Dante’s transition to Beatrice signifies his movement beyond the classical tradition and the constraints of history toward the spiritual fulfillment found in the heavenly realm.1

This departure is a pivotal dramatic moment in the poem, marking the point where Dante must rely on faith and divine revelation rather than the earthly reason that Virgil embodies.1