Commentaries:
Jamieson, Fausset, and Brown
Servants—literally, "slaves."
masters according to the flesh—in contrast to your true and heavenly Master (Ephesians 6:4). A consolatory him that the mastership to which they were subject, was but for a time [CHRYSOSTOM]; and that their real liberty was still their own (I Corinthians 7:22).
fear and trembling—not slavish terror, but (See on I Corinthians 2:3; II Corinthians 7:15) an anxious eagerness to do your duty, and a fear of displeasing, as great as is produced in the ordinary slave by "threatenings" (Ephesians 6:9).
singleness—without double-mindedness, or "eye service" (Ephesians 6:6), which seeks to please outwardly, without the sincere desire to make the master's interest at all times the first consideration (I Chronicles 29:17; Matthew 6:22-23; Luke 11:34). "Simplicity."
Other Jamieson, Fausset, and Brown entries containing Ephesians 6:5:
Romans 12:11
1 Corinthians 2:3
2 Corinthians 1:12
Ephesians 5:22
Philippians 2:12
Colossians 3:22
2 Timothy 2:22
Titus 2:9
Titus 2:10
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