Out of every line I've written, the one I'd consider as 'famous' would be this one, as the idea it reflects basically shapes the entirety of the first saga.
"The will to keep moving beyond losing everything in hopes of one day correcting the action that caused everything to be lost, that is the point at which dreams become delusions, or so this story is told."
Then there's another line that I also really like but haven't yet published.
"Regret. That is the single true common ground that unites all beings that walk this and every world. The bird, in its starvation, regrets its slowness as another claims the worm it had been eyeing. The lion, scarred and alone, regrets the meaningless battles it chose that whittled down its lifespan before its untimely demise. And humans... humans are the weakest of all. They repress their traumas, they avoid the consequences of their actions, they, with their unrivaled intelligence, choose to hide behind facades of 'self-perfection'. They do not face their regrets... So for what reason do you believe your pitiful existence could suddenly shake off those shackles of regret after running away for so long?"