What does John 9:25 mean?
When Jesus first approached him, this man had been blind from birth (John 9:1). After applying mud to his eyes, Jesus' instructions were for the man to go elsewhere to wash off (John 9:6–7). As a result, this verse occurs at a time when the formerly blind man has still not physically seen the One who healed him. There is no indication the man sought Jesus out or knew anything about Him prior to this incident, though apparently he did know Jesus' name (John 9:11). Local religious leaders cannot accept that Jesus has performed a miracle, so they have been interrogating the man and his parents, insisting that Jesus must be a sinner.The man's response here is an excellent summary of how saving faith operates. Scripture often uses sight—or light—as a metaphor for faith. This man is not a trained scholar, or wealthy, or well-read. He evidently knows nothing about Jesus' prior ministry or the details of Jesus' ministry. But what he does know, he knows for sure: he had been blind, and now he can see! The profound, inexplicable change brought by an encounter with Christ was beyond debate. For Christians, this is the cornerstone of our testimony: the influence of Christ in our own lives. This is what opens our conversation with others about the reality of the gospel (Mark 5:19) and leads into all other evidence and arguments (1 Peter 3:15–16).
This statement also adds weight to the idea that a person doesn't need perfect theological knowledge to be a true believer. John's inclusions and exclusions in this gospel are deliberate. Including this remark has meaning. That Jesus was sinless—that He was not a "sinner"—is crucial to Christian doctrine (Hebrews 4:15; 2 Corinthians 5:21; 1 John 3:5). In that sense, this man is ignorant on an important point. But that doesn't stop Him from reacting correctly to Christ's call: open-minded acceptance based on what he does know (Matthew 18:3; John 9:38). Of course, resisting truth is not the same as sincere error (John 5:39–40).