Jem seemed to look through her then, as if he were seeing something beyond her, beyond the corridor, beyond the Institute itself. "Whatever you are physically," he said, "male or female, strong or weak, ill or healthy--all those things matter less than what your heart contains. If you have the soul of a warrior, you are a warrior. All those other things, they are the glass that contains the lamp, but you are the light inside." He smiled them, seeming to have come back to himself, slightly embarrassed. "That's what I believe.

Author: Cassandra Clare