Faith lives in the same apartment building as Doubt. When Faith was out of town visiting her uncle, Doubt fed the cat and watered the asparagus fern.
Faith is comfortable with Doubt because she grew up with him. Their mothers are cousins. Faith is not dogmatic about her beliefs like some of her relatives.
Her friends fear that Faith is a bit stupid. They whisper that she is naive and she depends on Doubt to protect her from the meanness of life.
In fact, it is the other way around.
It is Faith who protects Doubt from Cynicism.
from The Book of Qualities