"Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?" (Hebrews 1:14)
Although most Christians are aware of the biblical doctrine of angels, few appreciate what a tremendous resource this may be. Even though they are invisible to us, angels are real, and are more involved in our personal lives than we realize.
The primary purpose for which they were created by God was, according to our text, to be servants (i.e., "ministers") to those who are to inherit salvation. They are beings of great wisdom, "to know all things that are in the earth" (2 Samuel 14:20). Furthermore, they "excel in strength" (Psalm 103:20). They can travel at tremendous speeds, "being caused to fly swiftly" (Daniel 9:21). Furthermore, there exists "an innumerable company of angels" (Hebrews 12:22), so God is able to dispatch any necessary number of them to "do his commandments" (Psalm 103:20) on behalf of His people.
Since their very existence is related to the heirs of salvation, they are intensely interested in all of God's plans and in our own individual roles in those plans--"which things the angels desire to look into" (1 Peter 1:12). They serve as guardian angels (Psalm 34:7; 91:11), especially in relation to children (Matthew 18:10). They are present in each local church (Revelation 2:1; etc.) and, while they minister to the church, they also themselves learn "by the church the manifold wisdom of God" (Ephesians 3:10). They are directly involved in the accomplishment of many providential miracles, such as Daniel in the lion's den (Daniel 6:22). Finally, they accompany each believer at death into the presence of the Lord (Luke 16:22; 2 Corinthians 5:8).
Perhaps, in that day, we'll meet the particular angels who have been assigned to our own protection and guidance and can thank them properly. HMM