Eugene Peterson is one of my favorite writers and thinkers. Here is a symposium (2007 Writers Symposium by the Sea), where he is asked by the moderator what he meant by his statement, "Most of what we have learned about God is wrong."
Eventually, he brings out the point that we are all sinners and "we don't have a sanctified imagination to receive things pure" (22:48-54 on clip).
This video is definitely worth watching in full. Check it out!