“Do you believe in ghosts, Maester?”

[Jaime] asked Qyburn.

The man’s face grew strange. “Once, at the Citadel, I came into an empty room and saw an empty chair. Yet I knew a woman had been there, only a moment before. The cushion was dented where she’d sat, the cloth was still warm, and her scent lingered in the air. If we leave our smells behind us when we leave a room, surely something of our souls must remain when we leave this life?”

George R.R. Martin, A Storm of Swords (A Song of Ice and Fire, #3)