I think the song means that you shouldn't judge a book by its cover. The blind man didn't literally teach him now to see, what the lyrics mean is that you have to look deeper. This blind man taught him that there's more to life than what you physically see. It's about understanding and feeling. You have to open your heart and your mind and let people in, and sometimes that means looking past your own insecurities and shallowness and then you might finally see the proverbial light.
I think the song means that you shouldn't judge a book by its cover. The blind man didn't literally teach him now to see, what the lyrics mean is that you have to look deeper. This blind man taught him that there's more to life than what you physically see. It's about understanding and feeling. You have to open your heart and your mind and let people in, and sometimes that means looking past your own insecurities and shallowness and then you might finally see the proverbial light.