Cassandra Clare said this quote

Being a vampire is not a curse. It’s a disease,” Tessa filled in. “But they still can’t enter hallowed ground, then? Does that mean they’re damned?” “That depends on what you believe,” said Jem. “And whether you believe in damnation at all.” “But you hunt demons. You must believe in damnation!” “I believe in good and evil,” said Jem. “And I believe the soul is eternal. I don’t believe in the fiery pit, the pitchforks, or the endless torment. I do not believe you can threaten people into goodness.