set in stone
carved in stone

His life had been set in stone at a young age.

"We have six games left and nothing is set in stone."

But his ideas were not set in stone, either, he said.

The law is set in stone, no one can change it.

His face was set in stone as he related the entire mission.

The code of practice itself will not be set in stone.

I feel it is important for the Council not to view this as set in stone.

I've said the current system is not set in stone.

Care plans do not have to be set in stone, and as the situation changes, the plan can change.

But even now, with a record deal, their shining star is not set in stone.