Don't get me wrong. "Amazing Grace" is a fantastic song, beloved by millions the world over and rightly so. But it has one line in it that may be one of the most harmful lyrics in any Christian song ever written, anywhere,  anytime.  This one line has contributed to keeping countless people in bondage to their religion,  with it's numerous false doctrines.  It has powerfully reinforced their deceptions. It goes like this  -

                            "I once was blind but now I see"

Hear me out. Every church in every deception sings this verse. Jesus testified that when the Pharisees declared they could see - they became blind. By declaring they can see (or understand), whether as an individual or a church or a denomination,  they are endorsing their false doctrines to be true, whatever they may be (every church has some, some more than others). They are precluding themselves from seeking truth because they believe they already know it. They are full of knowledge  - they know facts - some true, spme false, but do they know Him personally? If those who are not even born-again but think they are, sing this verse, it's a tragedy. If those who resist the Holy Spirit and rebuke His presence and power at every opportunity,  sing this verse - it's a travesty.  To declare  "I can see" while we are still blind will keep us blind till our dying breath. We must all declare "Everywhere I'm blind Lord, heal me". "Every false doctrine i believe is true, reveal it to me. Everything I think is true but isn't  - reveal it to me that I may repent of it. Every bit of the wretch that i was that still lives in me - crucify Lord! Along with you. I want to die with You that I might live with You". 

Selah