- Ontology (the object of the most ancient philosophical studies, this object explains the nature of all that exists)
In the object of ontology studies are divided into 5:
1. Monoism (explaining that the element of everything that exists is one/esa
Monoism divided into 2 :
A. Materialism (the school which considers that the origin of everything comes from material)
B. Idealism (assuming that everything is spiritual in nature or spiritual)
2. Dualism (according to this school everything comes from 2 elements, for example, body and spirit)
3. pluralism (assuming that all forms are real)
4. Nihilism
5. Agnosticism (this understanding denies the ability of humans to know the nature of things)
- metaphysics
 One branch of philosophy that discusses everything that can be felt or even cannot be felt by the five senses)
Aristotle said that metaphysics is divided into 2 objects, namely:
Something that exists,
Something that can be obtained when we gain knowledge
Something divine
Something that cannot be felt by the five senses
- There are 2 objects of metaphysical study, namely quantitative and qualitative
