Commentaries:
Robertson's Word Pictures (NT)
A second time (ek deuterou). He had given the Pharisees the facts the first time (John 9:15). It was really the third time (see palin in John 9:17). Now it was like a joke unless the Pharisees meant to imply that his previous story was untrue.
Give glory to God (dov docan tw qew). Second aorist active imperative of didwmi (cf. sxes, ev). This phrase does not mean gratitude to God as in Luke 17:18. It is rather an adjuration to speak the truth (Joshua 7:19; I Samuel 6:5) as if he had not done it before. Augustine says: "Quid est Da gloriam Deo? Nega quod accepisti." Is a sinner (amartwlov estin). They can no longer deny the fact of the cure since the testimony of the parents (John 9:19) and now wish the man to admit that he was lying in saying that Jesus healed him. He must accept their ecclesiastical authority as proving that Jesus had nothing to do with the cure since Jesus is a sinner. They wish to decide the fact by logic and authority like all persecutors through the ages. Recall the Pharisaic distinction between dikaiov (righteous) and amartwlov (sinner).
Other Robertson's Word Pictures (NT) entries containing John 9:24:
John 10:1
Revelation 11:13
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