John 9:30-31

The healed man not only possessed a sense of humor but also common sense. It seemed remarkable to him that the Pharisees could not see that Jesus had come from God. Their unbelief in view of the evidence was incredible to him. The proof that Jesus had come from God was His ability to perform such a powerful and constructive miracle as giving sight to the blind. A fundamental biblical revelation is that God responds positively to the godly, but He does not hear (in the sense of granting the requests of) those who sin (Job 27:9; Job 35:13; Psalms 34:15-16; Psalms 66:18; Psalms 145:19; Proverbs 15:29; Proverbs 28:9; Isaiah 1:15). Obviously not all miracle-workers had come from God (cf. Exodus 7:22; Exodus 8:7), but these had been exceptions to the rule. The former blind man showed considerable spiritual insight.

"It is always risky to identify spiritual power with divine power. But such theological niceties do not trouble the healed man. His spiritual instincts are good, even if his theological argumentation is not entirely convincing." [Note: Carson, The Gospel . . ., p. 375.]