Indeed, that is very true, and was the case for me 20 years ago. I was a member of the AOG for 12 years or so until I fell away from faith altogether. Then when my eyes were opened, I saw my marriage falling apart...my children walking the ways of the world without Christ...prompted me to come back to Him. Falling on my face I pleaded with Him to start afresh...to teach me from scratch...I wanted no gaps, no doubts, no half-truths, no half-pie beliefs that weren't fully supported from scripture, and I did not want to fall away again or go the way of so many whose faith is up and down like a roller coaster ...high one day low the next. I fully surrendered that day. And I do so every day now.
And He did just that. While kneeling before Him that very moment, despite not having had a Bible in my hand for many years, He said, "seek ye first the kingdom of God and His righteousness, and all these things (a healed marriage and my children in faith) would be added unto you". He has kept His promise. So yes, sometimes we need to start over...start from scratch again just to say to God, cleanse me from all the rubbish that may have gotten through, deliver me from the viruses that are so prevalent in the church slowing down and sometimes preventing optimum performance.