Have you ever been around someone for a long time, and kind of thought you knew who they were, only to discover you were totally wrong?  In a negative way, it might be a person you dated, only to discover they had misrepresented themselves.  From a positive angle it might be that unassuming neighbor that unbeknownst to you, serves a weekly dinner to the homeless.  As we come to Matthew 16, Jesus asks an identity question needing to be answered by every human in every generation.  The answer might surprise even the most mature Christians!