There is no limit to human self-deception. In Fredo's mind, his low self-esteem must have been a product of the fact that he was "passed over"; ergo, if he were the Don, everything would be righted.
Ntra la porta tua lu sangu � sparsu, E nun me mporta si ce muoru accisu... E s'iddu muoru e vaju mparadisu Si nun ce truovo a ttia, mancu ce trasu.