GRATITUDE.

The virtue of gratitude is said to be more [developed] in the birds
called hoopoes which, knowing the benefits of life and food, they
have received from their father and their mother, when they see them
grow old, make a nest for them and brood over them and feed them,
and with their beaks pull out their old and shabby feathers; and
then, with a certain herb restore their sight so that they return to
a prosperous state.

AVARICE.

The toad feeds on earth and always remains lean; because it never
eats enough:-- it is so afraid lest it should want for earth.