You can't really write things in stone that they're going to happen.

"All I want is a general idea, not an answer written in stone."

Written in stone by someone, and not anyone you or I know.

She is considering taking history, but that's not written in stone.

Men shape the future, and nothing is written in stone.

Here the story of wind and water is written in stone.

What happens next might as well be written in stone.

Not always equal parts either, as nothing should be written in stone.

The time and place of the meeting were set, but hardly written in stone.

What's written in stone today is often washed away by time.