Commentaries:
Robertson's Word Pictures (NT)
Father, glorify thy name (pater, docason sou to onoma). First aorist (note of urgency) active imperative of docazw and in the sense of his death already in verses John 12:16, John 12:23 and again in John 13:31; John 17:5. This is the prayer of the pneuma (or yuxh) as opposed to that of the sarc (flesh) in verse John 12:27. The "name" (onoma) of God expresses the character of God (John 1:12; John 5:43; John 17:11). Cf. Matthew 6:9.
A voice out of heaven (fwnh ek tou ouranou). This was the Father's answer to the prayer of Jesus for help. See already the Father's voice at the baptism of Jesus (Mark 1:11) and at the transfiguration (Mark 9:7). The rabbis called the audible voice of God bath-qol (the daughter of a voice).
I have both glorified it and will glorify it again (kai edocasa kai palin docasw). This definite assurance from the Father will nerve the soul of Jesus for the coming ordeal. Cf. John 11:40 for edocasa and John 13:31; John 17:5 for docasw.
Other Robertson's Word Pictures (NT) entries containing John 12:28:
Luke 9:35
John 5:37
John 5:43
John 12:2
John 12:30
Revelation 10:3
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