- Ontology is the study of beings or their being — what is.
- Epistemology is the study of knowledge — how we know.
- Logic is the study of valid reasoning — how to reason.
- Ethics is the study of right and wrong — how we should act.
- Phenomenology is the study of our experience — how we experience.
Traditionally, philosophy includes at least four core fields or disciplines: ontology, epistemology, ethics, logic.
"Our lives begin to end the day we are silent about things that matter"