Augustine of Hippo
The proclamation of the Word shines forth before Him, resembling lightning in the brilliance of His image. The clouds passed by, yet the bearers of His message were not confined to the territories of Judea; they reached out to the Gentiles. Hail and fiery coals represent symbolic warnings, whereby, akin to hail, hardened hearts are struck. However, when the ground is cultivated and softened, meaning when a devout spirit embraces the message, the hardness of the hailstones transforms into water. The terrifying brilliance of the sharp denunciation is changed into life-giving instruction, invigorating hearts ignited by the flame of divine love.
Of the radiance in His gaze (Psalms 17:12), it is akin to the brilliance found in the visibility of His presence. His clouds have dissipated. The heralds of His message are no longer restricted to Judea, but have extended their reach to the Gentiles. Hail and fiery coals. Criticism arises, striking hard hearts similar to hail; yet if the cultivated and insightful heart, that is, the devout spirit, embraces them, the hardness of the hail transforms into the refreshing waters, which represents the fear of the thunder. When charged and seemingly frozen, this reproach turns into affirming teaching, and hearts ignited by the flame of divine love are rejuvenated. All this has occurred as His clouds moved toward the Gentiles.