Gregory of Nyssa’s allegorical exegesis in the Life of Moses II,1–18 is extremely coherent and well‑structured. There is one main idea – the development of human rationality. This is expressed in three images demonstrating its gradual growth and final sovereignty: the baby boy threatened with death, a Hebrew fighting with an Egyptian, and a shepherd tending sheep. A supporting stream of images speaks about the changing role of profane culture in this process (the ark and Pharaoh’s daughter, the Hebrew and the Egyptian, and Moses at the water sources in Madiam). The passage ends with the image of the sovereign rule of reason as the basic prerequisite for any further spiritual development.