We're comfortable with the numbers, knowing how cloudy the crystal ball is.

Sometimes, the crystal ball is a little bit cloudy and the influenza virus fakes us out so that the virus in the vaccine isn't an exact match for the virus circulating in the community.

I can't speak for the future. I have no crystal ball.

I don't think anybody has that crystal ball but the president.

I'm not in the business of reading tea leaves. I don't have a crystal ball.

He who lives by the crystal ball will eat shattered glass.