And with sudden, chilling certainty, she realized that there was only one way, to ensure her silence.

There could be but one explanation of this sudden certainty on her part.

With a sudden certainty I knew today would be different.

She knew, with a sudden deep certainty, that they could never build anything together.

"You should accept him," the princess said, with sudden, total certainty.

And knew, with a sudden certainty that surprised her, that she wanted him.

With a sudden clear certainty he knew that when those two went down, they would go down together.

And where do feelings like this come from, these sudden certainties?

That was Louis, his mind told him with sudden irrational certainty.

That thought led to another, and sudden dreadful certainty gripped him.