President John F. Kennedy once said,

"The greatest enemy of truth is often not the lie, deliberate, contrived, and dishonest, but the myth, persistent, persuasive and unrealistic. One of the greatest deceptions ever perpetrated upon modern America has been through the myth of the "Wall of Separation between Church and State." -John F. Kennedy

http://www.frc.org/familypolicylecture/policy-lecture--wall-of-separation-between-church-and-state

http://www.youtube.com/watch?v=aIQuBGrbZVI&feature=related