Commentaries:
Notice that it says angels—plural—who report to God, which is what "see the face of God" means: They stand before Him, are in communication with Him, give reports to Him, analyze and give evaluations to Him. They are telling Him what our needs are. What is the purpose of these angels? They ensure that we have every opportunity to grow to the greatest extent possible that God might save us and reward us to our highest potential.
John W. Ritenbaugh
Image and Likeness of God (Part Five)
The explanation of why we should not despise weak Christians relates to the care Christ gives to them. First, God's angels watch over and aid His followers. Some of the universe's highest and noblest beings, who enjoy the favor and fellowship of God, minister to even the most obscure Christians (Hebrews 1:14)! They are that precious to God.
Second, Christ Himself came to save the weak (I Corinthians 1:26-29). He came in search of the weak and base that were lost, found them, and redeemed them according to God's great purpose. They may be obscure and little in the eyes of the world, but they cannot be objects of contempt if Christ sought them and died to save them.
Martin G. Collins
Parables of the Millstone and the Lost Sheep
Other Forerunner Commentary entries containing Matthew 18:10:
Matthew 18:1