THEOSISGregory of Nyssa
In a similar manner (refer to Ex. 8: 5), it is crucial to recognize that the rod caused the air to be darkened for the Egyptians, while for the Hebrews, it was filled with radiant light. This observation particularly reinforces our previous assertion: the darkness faced by one group does not stem from a celestial force, nor does the light enjoyed by another come from above. Instead, we, as human beings, through our inherent nature and choices, are the architects of both light and darkness, shaping our own destinies. The narrative indicates that the enjoyment of light by the Hebrews was not obstructed by any physical barrier preventing the Egyptians from experiencing the same.
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Just as it is within everyone's capacity to walk in the light, some choose to dwell in darkness, guided into sinful shadows by malevolent desires, while others find enlightenment through virtuous paths. Should the Egyptians, after enduring three days of darkness, be allowed to share in the light, it is conceivable that those who previously adhered to Egyptian ways, upon encountering the understanding of the Crucified and embracing repentance, might transition from immorality to righteousness. This profound darkness (Ex. 10:21), historically significant, closely resembles the darkness of ignorance and sin. Nevertheless, both forms of darkness dissipate the moment Moses extends his hands over those enveloped in shadow, as was previously suggested.