Commentaries:
Robertson's Word Pictures (NT)
If a man keep my word (ean tiv ton emon logon thrhsh). Condition of third class with ean and constative aorist active subjunctive of threw. Repeated in verse John 8:52. See verse John 8:43 about hearing the word of Christ. Common phrase in John (John 8:51-52, John 8:55; John 14:23-24; John 15:20; John 17:6; I John 2:5). Probably the same idea as keeping the commands of Christ (John 14:21).
He shall never see death (qanaton ou mh qewrhsh eiv ton aiona). Spiritual death, of course. Strong double negative ou mh with first aorist active subjunctive of qewrew. The phrase "see death" is a Hebraism (Psalms 89:48) and occurs with idein (see) in Luke 2:26; Hebrews 11:5. No essential difference meant between oraw and qewrew. See John 14:23 for the blessed fellowship the Father and the Son have with the one who keeps Christ's word.
Other Robertson's Word Pictures (NT) entries containing John 8:51:
John 3:3
John 8:51
John 8:52
John 10:1
John 14:15
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