事都早已不关己扮途人能更可喜
[shì dōu zăo yĭ bù guān jĭ bàn tú rén néng gèng kĕ xĭ]
This phrase can be understood as 'Since everything already has nothing with oneself then pretending to be a stranger might be more enjoyable instead'. The person chooses not to involve personal emotion into matters which seem irrelevant to himself or herself now, trying to stay indifferent like passers-by and enjoy such aloof lifestyle better.