"Unknowable, inscrutable, uniquely our own: inner voices ..."
('Meditation or The Inner voice' by Auguste Rodin circa 1896)
"Most of us have an inner voice: that constant presence that tells you to 'Watch out' or 'Buy shampoo' or 'Urgh, this guy’s a creep'. For many of us, this voice sounds much like our own, or at least how we think we sound. But for some people, their inner voice isn’t a straightforward monologue that reproaches, counsels and reminds ..." read more here