I don't care what happens next; the future will take care of itself
Proverb expressing a carefree or resigned attitude about the consequences of one's actions; often used when one has done all they can and leaves the rest to fate.
I've done everything I can. Whatever happens next, I don't care.
He always has a 'come what may' attitude and never makes plans.
A set phrase of uncertain origin; literally 'after this, let it become fields, let it become mountains', implying that whatever happens to the land afterwards is of no concern.