As an old story told through knowing new eyes, it's slicker than it looks.

He looked down at her with knowing brown eyes.

April had stayed behind, watching him go with sad, knowing eyes.

Henry was standing there already, he looked at his face with knowing eyes.

I looked away from those suddenly knowing eyes of his.

He searched the image of her face again, those knowing eyes, then looked down at the boy.

The man attracted Harry's attention because of his sharp, knowing eyes.

The counselor looked at her young companion with knowing eyes.

The dance was on and they had not been long gone, but knowing eyes followed them.

How else could he explain their sad and knowing eyes?