Augustine of Hippo

"Unto the right-hearted there arises up light in the darkness" [Psalm 112:4]. Justly do the godly direct their heart unto their God, justly do they walk with their God, preferring His will to themselves; and having no proud presumption in their own. For they remember that they were some time in darkness, but are now light in the Lord. …

Exposition on Psalm 112 ↗

Jerome

Unto the upright of heart a light has risen in the darkness. We were once in darkness, we were sitting in darkness and in the shadow of death: but a light has arisen for us, according to Isaiah. Merciful and compassionate and righteous. See the two things he says, Merciful and righteous. If you are a sinner, do not despair of pardon: He is merciful. But if you are proud, and put your confidence in the clemency of God, do not be negligent: He is also righteous. Merciful and compassionate and righteous. …

Homily 38, on Psalm 111 ↗

Bede

"Behold, an angel of the Lord stood by them, and the brightness of God shone around them." What does it mean that, as the angel was appearing to the shepherds, the splendor of divine brightness also enclosed them, something that we have never discovered in the whole course of the Old Testament? Though in countless cases angels appeared to prophets and just people, nowhere do we read of angels enclosing the human beings with the brightness of divine light. …

Homilies on the Gospels 1:6 ↗