Gregory the Dialogist

What is the garrison of the Philistines, if not the strength of malignant spirits? For holy men, when they prepare themselves for the correction of sinners, openly know that they fight against angels fallen from heaven. This battle, therefore, since it is between angels and men, is fought by the strong against the weak, by the cunning against the simple. For he had received an assault from these strong ones, who said: "The strong have rushed upon me, though neither my iniquity nor my sin, O Lord" (Psalm 58:4). …

Commentary on 1 Kings, Book 5, Chapter 4 ↗