Commentaries:
Robertson's Word Pictures (NT)
If so be that it is a righteous thing with God (eiper dikaion para qew). Condition of first class, determined as fulfilled, assumed as true, but with eiper (if on the whole, provided that) as in Romans 8:9, Romans 8:17, and with no copula expressed. A righteous thing "with God" means by the side of God (para qew) and so from God's standpoint. This is as near to the idea of absolute right as it is possible to attain. Note the phrase in verse 2 Thessalonians 1:5.
To recompense affliction to them that afflict you (antapodounai toiv qlibousin hmav qliyin). Second aorist active infinitive of double compound ant-apodidwmi, old verb, either in good sense as in 1 Thessalonians 3:9 or in bad sense as here. Paul is certain of this principle, though he puts it conditionally.
Other commentary entries containing this verse:
Acts 17:10
Romans 11:35
1 Thessalonians 3:9
2 Thessalonians 1:5
2 Thessalonians 1:7
2 Thessalonians 1:8
2 Thessalonians 1:11
2 Thessalonians 1:11
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