是是非非都已变成成灰
[shì shì fēi fēi dōu yĭ biàn chéng chéng huī]
This can be translated into 'The Right or Wrong Matters Have Become Ashes,' implying past disputes, misunderstandings, arguments, or grievances no longer matter as they have all been reduced to insignificance like ashes. There's a sense of letting go and moving on beyond the complexity of the world.