Commentaries:
Robertson's Word Pictures (NT)
And who is he, Lord, that I may believe on him? (Kai tiv estin, kurie). The initial kai (and) is common (Mark 10:26; Luke 10:29; Luke 18:26). Probably by kurie he means only "Sir." It usually comes at the beginning of the sentence, not at the end as here and verse John 9:38.
That I may believe on him (ina pisteusw eiv auton). Ellipsis to be supplied before this final clause. He catches up the words of Jesus in the preceding verse, though he does not yet know who the Son of Man (or Son of God) is, but he trusts Jesus.
Other Robertson's Word Pictures (NT) entries containing John 9:36:
Matthew 1:22
John 9:11
John 9:25
John 9:28
John 9:38
John 13:13
Acts 9:5
2 Corinthians 2:2
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