The child Silas put the horse in a drawer. He never took it out again.
Scrooge represents the ultimate danger of unchecked rationalism and self-interest. He is a man who has calcified his heart. Dickens describes him as "solitary as an oyster," a metaphor that suggests both hardness and the potential for a hidden pearl. The tragedy of Scrooge is not that he hates the world, but that he has walled himself off from it. He is a spiritual amputee, having severed his emotional limbs to avoid the pain of existence.
“You have tonight,” the ghost said. “What will you wind before it runs out?”