I appreciate your post and your passion to grow. I been shown to be so radically wrong in many of my beliefs that I've come to trust in God all the more. My trust is in Him to lead me into truth, and thankfully salvation is not dependent upon having all your doctrine correct, but upon faith in the finished work of Christ. Also, salvation for me is not just a future hope, but it's a present reality with a future hope. I am saved, acceptable to God, born of His Spirit, and seated with Christ in Heaven NOW, and I have a future hope of a greater realization of this present reality. Salvation is the establishment of a very personal real relationship with the Lord.
Concerning correcting wrong thinking, absolutely we should be involved in discussing scripture and learning with and from eachother. As you mentioned though, such has far more to do with our attitudes than it does with our knowledge or skill. If we are humble, recognizing just how much of a mess we are, then we are open to what others share, even though it is radically different than what we've believed all of our lives. However, the more pridiful we are, the more closed minded we are.
We should be like the Bereans who 1, eagerly received the radical new information that Paul preached, and 2, were dilligent to study the scriptures to verify what he said was true. Openness and Diligence - two keys to really growing in the Word. And Openness requires both humility and faith. Humility - accurate assesment of one's own need of God. & Faith - both a faith in God to teach us and lead us into truth. And an openness and/or trust in other people. If we think everyone is wicked except us, then we are both prideful and deceived.
Of course, opennes doesn't mean we are gullible; we need to have a healthy caution, but we don't need to be suspicious or fearful. One of the assumptions that I have about myself is I assume that I am wrong in places, have errant doctrine, and need God to reveal the truth to me. Thus I am quick to listen to what others say even though it's radically different than what I currently believe. And even more so, I'm learning to listen for what i call, the Ring of Truth. Truth has a "ring" to it. It reasonates deep inside your heart and has a power all on its own.
Well, I'm just rambling. I do pray that you and we all will be increasingly filled with God's Spirit and that we may come to an increased understanding of just how marvelous God's love and grace is towards us.