Metaphysics is a branch of philosophy that explores abstract concepts such as existence, causality, and essence. It is concerned with understanding the nature of reality beyond what we can observe and measure. In this article, we will explore the two main branches of metaphysics: ontology and cosmology.


Ontology is the branch of metaphysics that deals with the study of existence itself. It asks questions such as “What exists?”

and “What is the nature of existence?” Ontologists seek to understand what types of things exist and how they are related to each other.


Being is a key concept in ontology. Being refers to anything that exists in any way, shape or form.

This includes physical objects, abstract concepts like numbers, and even ideas or thoughts. Ontologists examine the different ways in which things can exist and how they relate to each other.

Categories of Being

One way ontologists categorize being is by dividing it into two broad categories: concrete being and abstract being.


Cosmology is the branch of metaphysics concerned with understanding the nature of the universe as a whole. It seeks to answer questions about the origin and nature of the universe itself.


Cosmos refers to everything that exists within the universe – from galaxies down to subatomic particles. Cosmologists study these objects and seek to understand how they relate to each other.

Theories of Cosmology

There are several different theories of cosmology, each with its own perspective on the nature of the universe. Some of the most well-known theories include:


In conclusion, metaphysics is a vast field that encompasses many different branches. Ontology and cosmology are two of the main branches, each with its own unique set of questions and perspectives. By exploring these branches, we can gain a deeper understanding of the nature of reality itself.