But doctors talk about cells as if they had such unlimited importance all by themselves. As if they didn't really belong to the person that has them." Teddy brushed back his hair from his forehead with one hand. "I grew my own body," he said. "Nobody else did it for me. So if I grew it, I must have known how to grow it. Unconsciously, at least. I may have lost the conscious knowledge of how to grow it sometime in the last few hundred thousand years, but the knowledge is still there, because—obviously—I've used it.