be certain of something

But he was certain of himself now, at least for the moment.

Certain of the people I had known came to power.

Probably too far away to be certain of a head shot right off.

She had never been so certain of anything in her life.

He was the only man in the room who felt certain of his own words.

On any given day, he will call certain of his top people.

He'd never been so certain of anything in his life.

For after all, who can be quite certain of the Beyond?

If the king seemed certain of himself, then they would be as well.

Was she so much less certain of her love for him?