The issue of comprehension of the concept of apocatastasis by Gregory of Nyssa is not easy to infer. The source texts are not explicit and sometimes even contradictory, and may raise reservations about their authenticity. The fol lowing article, based on the preserved legacy of Gregory the Great and modern scientific literature, attempts to answer the subsequent questions: in what manner did Gregory under stand the biblical message of eternal damnation; how did he comprehend the subject of the after death penalty; in what way did he perceive the particular and the final judgment and by what means did he resolve all these issues with the hypothesis of apokatastasis? Gregory’s writings were dominated by the idea of temporariness and curative character of posthumous punishments. They will have a corrective character and should last only as long as it is required in order to completely cleanse soul of the remnants of sin. It remains uncertain whether punishment will be temporary also in the case of hardened sinners and whether Gregory considered for them eternal condemnation. In Gregory’s es chatology, a constant vibrant tension between the addressed to all humanity God’s salvific grace and human freedom and responsibility is present, which the Nyssenian never tried to undermine. In Gregory’s attempt to solve this aporia, his concepts seem to lean towards the final mercy solution and universal God’s salvific will. Although Gregory derived the premises for expressing this belief from Platonic philoso phy, his hope for the return of everyone to God was ultimately rooted in theological arguments: omnipotence and the infinite goodness and mercy of God, and in the resurrection of Christ.