Theologica was used to teach catholic priests

I believe the answer you are looking for is the author, although with such a little bit of information I cannot be sure. If so the author is

Thomas Aquinas

All you gotta do is write about animals and how they can relate to you, for eat, they have a family, they have a heart, they have feelings, a bird can fly and probably that can be a symbol like your dreams “sky is the limit” etc etc