"I only need four hours a night of meditation. I'm not sure if that counts as sleep." He turned his face to look at her. She wore a white knit shirt. On her upper chest, under the material, he could see the glow of the gel-stone. Its muted, yellow-green light reversed the usual pattern of shadows on her face. She looked exotic, mysterious. But then all humans were mysterious to him. "What do you mean by a 'dream?'"