They'll lack a certain voice that I will never hear again.

"In the volcano," he said, his voice less certain than before.

Whether in or out of fashion, he has captured a certain voice that is unique.

"We all go," Firella said, in a voice even more certain.

She heard her own voice, certain and distinct, inside her head.

"You weren't born alone," she said, with a plain, certain voice.

Kirk tried to make his new voice sound certain.

Then, in a different, less certain voice, she added, "You know.

"Get up, Wolfe," he said softly, his voice cold and certain as death.

It spoke in a voice so clear and certain that he could not ignore it.