10) You are not continually learning or adapting
Note to disciples: You never really get Jesus' message clearly enough to convey it to others, because you are stuck in what you want him to be and what you want your life with him to look like. You need to be open to continually learning and growing to be able to share his presence and message with others.
All my notes so far have been to first-century disciples. But a note to 21st-century disciples could have similar warnings against short-sighted thinking, inward focus, insecurity, rigidity, lack of integrity, and unwillingness to accept inconvenience and sacrifice for the sake of the gospel.
People complain that we are making the gospel a commodity these days. If so, we're not doing a very good job at selling it when our habits of thought and action violate basic and widely held principles of sales.