Commentaries:
Robertson's Word Pictures (NT)
For the sake of the Name (uper tou onomatov). The name of Jesus. See Acts 5:4; Romans 1:5 for uper tou onomatov and James 2:7 for the absolute use of "the name" as in I Peter 4:16. "This name is in essence the sum of the Christian creed" (Westcott) as in I Corinthians 12:3; Romans 10:9. It is like the absolute use of "the Way" (Acts 9:2; Acts 19:9, Acts 19:23; Acts 24:22).
Taking nothing (mhden lambanontev). Present active participle with the usual negative with participles (I John 2:4).
Of the Gentiles (apo twn eqnikwn). Instead of the usual eqnwn (Luke 2:32), late adjective for what is peculiar to a people (eqnov) and then for the people themselves (Polybius, Diodorus, not in LXX), in N.T. only here, Matthew 5:47; Matthew 6:7; Matthew 18:17. Like our heathen, pagan. John is anxious that Christian missionaries receive nothing from the heathen, as our missionaries have to watch against the charge of being after money. There were many travelling lecturers out for money. Paul in 1Co. 9 defends the right of preachers to pay, but refuses himself to accept it from Corinth because it would be misunderstood (cf. I Thessalonians 2:6 ff.; II Corinthians 12:16 ff. II Corinthians 12:16 ff.). Note apo here as in collecting taxes (Matthew 17:25) rather than para, which may be suggestive.
Other Robertson's Word Pictures (NT) entries containing 3 John 1:7:
Acts 5:41
1 John 2:12
1 John 3:16
2 John 1:7
3 John 1:9
Revelation 11:1
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