How much do you have to know anyway.  All the fine points of the Bible can be learned as you go along.  But for the purpose of sharing Christ--being a disciple--you really only need your own experience.  You needed forgiveness.  God forgave you.  In Christ.  Jesus covered what you have done wrong.  He is ready to forgive others as well.

James 1: 23-24  "For if anyone is a hearer of the word, and not a doer, he is like a man beholding his natural face in a glass (mirror): For he beholds himself, and goes his way, and straight away forgets what manner of man he was."

Sunday morning Christians.   They come to church on Sunday, listen attentively, agree with everything that is being taught, and then go home and do nothing about it.  Unchanged.   The Gospel is a life changing message.  But it has to start from the inside and work its way out.  Not the other way around.  If Christ is not in your heart, you have no motive to change.

We use other people to be our looking glass.  You say something, they smile or frown and you react.  People behave in a back and forth way, being shaped from the outside in.  You may think you are a self made man, but the truth is, we are all shaped by what we grow up observing.  And the way to be changed from the inside out is to let Christ shape you.  In the Bible it's called regeneration.

After Ken retired from the Marine Corps, he taught Sociology at a local college.  There was a theory that was prevalent among Sociologists at the time, (by Cooley) called the "Looking Glass Theory."  Ken always took his Bible into the classroom and read James 1: 23-24 to the class and told them that this "looking glass" theory wasn't new.  It had been written over 2000 years ago.   And that we were changed in only two ways.  Either from the outside in, (Looking Glass Theory) or from the inside out.

Great way to get the Bible into the classroom.