Commentaries:
Robertson's Word Pictures (NT)
We must work the works of him that sent me (hmav dei ergazesqai ta erga tou pemyantov me). This is undoubtedly the correct text (supported by the Neutral and Western classes) and not eme (I) and me (me) of the Syrian class nor hmav (we) and hmav (us) of the Alexandrian class. Jesus associates us with him in the task committed to him by the Father. Bernard argues vigorously, but vainly, for eme me. We are not able to fathom the depth of the necessity (dei) here involved in each life as in this poor blind man and in each of us.
While it is day (ewv hmera estin). This clause gives the note of urgency upon us all.
The night cometh (erxetai nuc). "Night is coming on," and rapidly. Night was coming for Jesus (John 7:33) and for each of us. Cf. John 11:9; John 12:35. Even electric lights do not turn night into day. ewv with the present indicative (John 21:22 f.) means "while," not until as in John 13:38.
Other Robertson's Word Pictures (NT) entries containing John 9:4:
Luke 10:16
John 11:9
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