The author now interprets the plague of darkness in Egypt (Ex 10:21-23). Conclusion: While the Egyptians experienced darkness, the Israelites were guided by the pillar of fire. The darkness of Egypt symbolizes the darkness of hell, reserved for sinners (17:21), while the Law serves as the light that illuminates the world (18:4, cf. Is 2:2-5). The author encourages believers to reflect on their own history to find God’s fingerprints.