So the Pharisees began to pressure the formerly-blind man, trying to distance him in some way from the miracle... and the miracle worker. But the formerly blind man was seeing things clearly, and he saw right through the pettiness of these Pharisees! The man states simply that Jesus must be a prophet (9:17). When the Pharisees insisted that Jesus of was a sinner (after all, he healed on the Sabbath), the man sarcastically responds, "Whether he is a sinner or not I don't know. One thing I do know. I was blind but now I see” (9:25). This formerly-blind man saw things much more clearly than did the Pharisees. For him, the essence of religious truth was not to be found in dusty tomes or trust tradition or lumbering logic; it was rather seen in the power of a changed life. The Pharisees could argue tradition and theology until they were blue in the face. The one thing he knew was that his life had been undeniably altered by the power of God and by a miracle-worker who had come from God.
Do you really want the world to see the truthfulness of your Christian faith? By all means, study the scriptures so that you can make an informed case for Christianity. By all means, prepare a line of reasoning so that you can present faith to others in a logical way. But when you get right down to it, most people are pretty pragmatic. Your logic and scripture will mean very little if you are not living a positive, dynamic and holy life that shows that your faith makes a real difference. Peter put it like this in 1 Peter 2:12--
Live such good lives among the pagans that, though they accuse you of doing wrong, they may see your good deeds and glorify God on the day he visits us.If your faith in God makes you a better friend, a better co-worker, a better family person, a better neighbor, a better person, then people will listen when you talk about it. But if faith doesn't have any real impact on your life in any visible way, then why would they want to listen to you talk about it? The greatest argument for the truthfulness of the faith is the lives of people who take it seriously! Otherwise the world will continue to be blind to the power of Jesus.