Gregory the Dialogist

For I always feared God like waves swelling over me, and I could not endure the weight of Him. From the terror that belongs to such a likeness let us reflect what wonderful force of fear there was in the holy man. For when waves swelling hang over us from on high, and when they threaten that death, which they bring down, there is then no concern for temporal things with the voyagers, no enjoyment of the flesh is brought back to mind. …

Morals on the Book of Job, Book XXI ↗

Thomas Aquinas

He shows then why although he was in a higher place in society he did not raise his hand against orphans. Even though he did not deliver them because of men, yet he did deliver them because of God whose judgments he feared, and so he then says, "For I always feared God like the swelling of waves over me." He speaks using the comparison of those sailing on the sea, who, when the swelling waves rise over the height of the ship, fear that the ship will be submerged by them. …

Commentary on Job ↗

Bonaventure

Gather together, then, these three considerations, namely the consideration of the sublimity of divine power, the consideration of the perspicacity of divine wisdom, and the consideration of the severity of divine vengeance. And who will there be who will not fear? …

Collationes de Septem Donis, Collation 2 ↗