A Chosid once shared with his Rebbe a concern he had about his father-in-law.
"Rebbe," the Chossid began, "I am sure it's not Lashon Hara, because I am concerned for his welfare..." He went on to tell his Rebbe that his father-in-law does not Daven. Anything.
"I even know where he keeps his Tallis, and kept a close watch and saw that it sits there for days on end... Rebbe, I'm begging you, please speak with him. Try to inspire him... I mean this for his benefit!"
After a few requests, the Rebbe called in the father-in-law to discuss the matter.
The father-in-law was straightforward. "Rebbe, I may not be a Tzaddik, but one thing I do not do: Lie. I just cannot lie, and for me to stand there every day, wrapped in my Tallis and Tefillin, and make believe that I am connecting with Hashem... when I am really thinking about everything in the world other than Him... I just cannot do it!
"Believe me, Rebbe," he continued, "I have tried to push myself, but it's impossible. I am not really Davening. I'm just standing there, lying to the Aibershter... and to everyone around me!"
The Rebbe listened to the distraught Chossid. A true dilemma! He really was unable to "put on a show" day in day out...