Commentaries:
Jamieson, Fausset, and Brown
Night and day—(See on I Thessalonians 2:9). Night is the season for the saint's holiest meditations and prayers (II Timothy 1:3).
praying—connected with, "we joy"; we joy while we pray; or else as ALFORD, What thanks can we render to God while we pray? The Greek implies a beseeching request.
exceedingly—literally, "more than exceeding abundantly" (compare Ephesians 3:20).
that which is lacking—Even the Thessalonians had points in which they needed improvement [BENGEL], (Luke 17:5). Their doctrinal views as to the nearness of Christ's coming, and as to the state of those who had fallen asleep, and their practice in some points, needed correction (I Thessalonians 4:1-9). Paul's method was to begin by commending what was praiseworthy, and then to correct what was amiss; a good pattern to all admonishers of others.
Other Jamieson, Fausset, and Brown entries containing 1 Thessalonians 3:10:
Acts 18:5-6
1 Thessalonians 3:1
1 Thessalonians 3:8
1 Thessalonians 3:12
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