Commentaries:
Robertson's Word Pictures (NT)
Those that use the world (oi xrwmenoi ton kosmon). Old verb xraomai, usually with the instrumental case, but the accusative occurs in some Cretan inscriptions and in late writers according to a tendency of verbs to resume the use of the original accusative (Robertson, Grammar, p. 468).
As not abusing it (wv mh kataxrhmenoi). Perfective use of kata in composition, old verb, but here only in N.T., to use up, use to the full. Papyri give examples of this sense. This is more likely the idea than "abusing" it.
For the fashion of this world passeth away (paragei gar to sxhma tou kosmou toutou). Cf. I John 2:17. Sxhma is the habitus, the outward appearance, old word, in N.T. only here and Philippians 2:7 f. Paragei (old word) means "passes along" like a moving panorama (movie show!). Used of Jesus passing by in Jericho (Matthew 20:30).
Other Robertson's Word Pictures (NT) entries containing 1 Corinthians 7:31:
Matthew 17:2
Romans 12:2
1 Corinthians 7:29
1 Corinthians 9:18
Hebrews 12:27
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