Early Christianity has enriched itself through the conflict and convergence of judeo-Christian revelation and Greek philosophical tradition. Platonism would be the paramount illustration of early theologians' attitude towards western classical culture. This article focuses on Gregory of Nyssa, one of the Cappadocians, and studies how Gregory adapted the soul doctrine of Plato and Platonism to his own distinctive theology through the analysis of the "soul ascending" passage in his Dialogue on Soul and Resurrection.