Found here. A very good article.
------------
This is a reprint of a column from a few years ago, but which bears repeating. Once the Church is restored to primacy, philosophy and related arts and sciences will likewise be revived, and the shameful neglect of generations undone.
- Epistemology: the study of knowledge. What is truth?
- Logic: the study of formal reasoning. What follows truth? Wither leads it? What conclusion must be true if a given statement is true?
- Metaphysics: the study of first principles. What precedes truth? Whence come it? What premise must be true when a given statement is true?
- Ethics: the study of virtue. What ought men do to be true?
- Natural Philosophy: the study of the visible order of creation.
- Aesthetics: the study of beauty, both in creation and created by man.
- Theology: the study of the invisible order of creation.
From these seven, several further branches spring:
- Epistemology includes Empiricism, Rationalism, Revelation, and perhaps more.
- Semantics, which asks how words are used, is a handmaiden to Logic, as statements must be put in signs or words. Geometry is logic applied to figures and ratios; Arithmetic is geometry expressed as magnitudes.
- Metaphysics, the study of first principles, includes Ontology, the study of first substances.
- Ethics includes Politics, which is the art of how to live in civilization, which necessarily includes Economics, the study of the trades in goods and services.
- Natural Philosophy includes the study of the inanimate world, Astronomy and Ballistics, Geography and Geology and Meteorology, and the various elements and energies of which they are composed, and includes also naturalism, which studies the growth and decay in due season of flora and fauna, their origins and destiny, and includes the study of man, his nature and his works.
- Aesthetics, ironically, also informs Rhetoric, which is the study of the figures of pleasant and persuasive public speaking, since persuasiveness is a type of beauty.