The only one who can not be convinced
of the Truth is the person
currently lying to him or her self.
When a person is lying to him or herself, it is an energetic act of protection AGAINST the Truth.
Thus, any thought, energy or words about the Truth are perceived as threats engendering further protective lies from the person to him or her self.
For those in the midst of lying to themselves, the knock of Truth upon the fortress doors of lies is perceived as a threat, not a route to freedom.