Commentaries:
Barnes' Notes
The glory of the Lord - This is the same as a "great" glory - that is, a splendid appearance or "light." The word "glory" is often the same as light, I Corinthians 15:41; Luke 9:31; Acts 22:11. The words "Lord" and "God" are often used to denote "greatness" or "intensity." Thus, "trees of God" mean great trees; "hills of God," high or lofty hills, etc. So "the glory of the Lord" here means an exceedingly great or bright luminous appearance perhaps not unlike what Paul saw on the way to Damascus.
Other Barnes' Notes entries containing Luke 2:9:
Daniel 8:18
Matthew 2:1
Matthew 2:2
Acts 7:30
Acts 7:55
Acts 9:3
Acts 12:7
Romans 5:2
1 Timothy 3:16
Revelation 18:1
Revelation 21:11
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