While John 9:25 is in reference to a physical healing that Jesus did, we all, even Christians, still suffer from blindness. Have you ever read a scripture at least a dozen times and then one day it all of a sudden, out of nowhere, the light bulb comes on and you understand the meaning of the scripture? Your blind eyes were opened and now you can see. I love when the Holy Spirit reveals scripture to me and opens my blind eyes. There are a lot of things we are blinded to here on this earth that when we get to heaven we will see clearly, 1 Corinthians 13:12. So always give God all the glory and praise when He allows you, through His Spirit, to see some things clearly here.