And it came between the camp of the Egyptians and the camp of Israel; and it was a cloud and darkness to them, but it gave light by night to these: so that the one came not near the other all the night.
Read Chapter 14
Cyril of Alexandria
AD 444
And it is written also in Exodus that when the ruler of the land of the Egyptians with his warriors was pursuing after the Israelites and was already upon the point of engaging with them in battle, the angel of God stood between the camp of the Israelites and of the Egyptians, and the one came not near the other all the night. There is therefore nothing unbefitting in supposing here also that the holy angel who was the guardian of the synagogue offered supplications in its behalf and prayed for a respite, if perchance yielding to better influence it might yet bring forth fruit.
A dark cloud, and enlightening the night. It was a dark cloud to the Egyptians; but enlightened the night to the Israelites, by giving them a great light.
Therefore this darkness of the body has been placed between us and God, like the cloud of old between the Egyptians and the Hebrews. This is perhaps what is meant by “He made darkness his separate place,” namely, our dullness, through which few can see even a little.
A dark cloud, and enlightening the night: It was a dark cloud to the Egyptians; but enlightened the night to the Israelites by giving them a great light.