Commentaries:
Robertson's Word Pictures (NT)
If (ei). Common construction after qaumazw (wonder) rather than oti (that, because). Present imperative here with mh means "cease wondering." Note mh qaumashv (do not begin to wonder) in John 3:6 (an individual case). See this same condition and language in John 15:18.
Other Robertson's Word Pictures (NT) entries containing 1 John 3:13:
John 15:19
Revelation 2:4
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