Believing ones own lies is definitely something I would expect of GBC.
Its my guess that he will find next weeks proceedings shocking, in that his "memory" of events and stories will now have been altered to what he prefers to believe, and in turn what he expects the rest of us to now believe.
He has so many traits of someone with a personality disorder, and fabricating the truth, compulsive lying, and denial, are just another of those traits.
He will be very interesting to watch next week as information comes out and witnesses give evidence, but its my bet he will deny (to himself, as no-one will be hearing from him) all that is said. We will see a lot of head shaking and turning of his back, as if he cant listen to such rubbish.
What he will be prepared to isten to will be all those witness reports that portray him as the amazing bloke he is (in his mind only).
And if there are any statements like that, they will be ALL he hears on the day, and all he talks about afterwards to his lawyer and family.
All my opinion only. Happy to place bets though...hehe