Unlearning

Half of learning is learning.  The other half of learning is unlearning.  Unfortunately, unlearning is twice as hard as learning.    

Even if you study the teachings of Christ, you'll realize that learning wasn't his primary goal.  His primary goal was unlearning.  Jesus was constantly uninstalling Old Testament concepts and upgrading them with New Testament truths.  

Half of spiritual growth is learning what we don't know.  The other half is unlearning what we do know.

-Mark Batterson, "In a Pit with a Lion on a Snowy Day"