David

“Fundamentally, Tianming was not suited to live in society, nor out of it. He lacked the ability to thrive in society, but also the resources to ignore it. All he could do was hang on to the edge, suffering. He had no idea where he was headed in life.”
― Liu Cixin, Death's End

“But I cannot accept a vision of You as an engineer who spends His days maintaining the machine of morality. I cannot take the idea of You as an optimizer, introducing evil into human affairs in an attempt to create the best of all possible worlds. I cannot bear this cold mathematician's God who sees all the universe as nothing more than an elaborate problem to be solved. Such a world is a world with no meaning, one in which one history is no more or less preferable to any other.”
― Dexter Palmer, Version Control

“I'd far rather be happy than right any day."
"And are you?"
"No. That's where it all falls down, of course."
"Pity", said Arthur. "It sounded like rather a good lifestyle otherwise.”
― Douglas Adams, The Hitchhiker's Guide to the Galaxy

“I don’t know what to do,” he said. “No harm in that. I’ve never known what to do,” said Rincewind with hollow cheerfulness. “Been completely at a loss my whole life.” He hesitated. “I think it’s called being human, or something.”
― Terry Pratchett, Sourcery