Just as an informal, nonscientific observation, most people's personalities don't seem to change very much during their lives. There are exceptions in the case of people who go through hugely traumatic events or suffer from brain injury or disease. Some would argue that religious conversions can have deep personality-altering effects. But these are all exceptions to the rule.
Neal StephensonYou should not believe a thing only because you like to believe it. We call that 'Diax's Rake.
Neal StephensonWhen you are wrestling for possession of a sword, the man with the handle always wins.
Neal Stephenson'Itโs, like, one of them drug dealer boats,' Vic says, looking through his magic sight. 'Five guys on it. Headed our way.' He fires another round. 'Correction. Four guys on it.' Boom. 'Correction, theyโre not headed our way anymore.' Boom. A fireball erupts from the ocean two hundred feet away. 'Correction. No boat.'
Neal Stephenson