Commentaries:
Robertson's Word Pictures (NT)
I have seen (ewraka). Present perfect active of oraw. John repeats the statement of verse John 1:32 (teqeamai).
Have borne witness (memarturhka). Perfect active indicative of marturew for which verb see John 1:32.
This is the Son of God (o uiov tou qeou). The Baptist saw the Spirit come on Jesus at his baptism and undoubtedly heard the Father's voice hail him as "My Beloved Son" (Mark 1:11; Matthew 3:17; Luke 3:22). Nathanael uses it as a Messianic title (John 1:49) as does Martha (John 11:27). The Synoptics use it also of Christ (Mark 3:11; Matthew 14:33; Luke 22:70). Caiaphas employs it to Christ as a Messianic title (Matthew 26:63) and Jesus confessed under oath that he was (verse Matthew 26:64), thus applying the term to himself as he does in John's Gospel (John 5:25; John 10:36; John 11:4) and by implication (the Father, the Son) in Matthew 11:27 (Luke 10:22). Hence in the Synoptics also Jesus calls himself the Son of God. The phrase means more than just Messiah and expresses the peculiar relation of the Son to the Father (John 3:18; John 5:25; John 17:5; John 19:7; John 20:31) like that of the Logos with God in John 1:1.
Other Robertson's Word Pictures (NT) entries containing John 1:34:
Luke 3:22
John 1:15
John 1:49
John 3:26
John 5:33
John 10:42
John 11:27
Acts 9:20
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