Aquinas's 24 Theses

1 ontology

Being is pure act or composed of act and potency.

2 ontology

Act is perfection; potency limits and differentiates it.

3 ontology

God is unique, simple; creatures composed of essence, being.

4 ontology

Being is analogical between God and creatures.

5 ontology

Creatures have substance plus accidental forms.

6 ontology

Relation is a real accident with distinct entity.

7 ontology

Spiritual creatures simple; essence united with being and accidents.

8 ontology

Corporeal creatures composed of form (act) and matter (potency).

9 cosmology

Matter and form lack independent being

10 cosmology

Substance indivisible; quantity is accident giving extension.

11 cosmology

Individuation principle is matter with quantity.

12 cosmology

Bodies occupy one place by quantity.

13 cosmology

Living bodies require organic parts for movement, soul.

14 psychology

Vegetative and sensitive souls dependent, corrupted with bodies.

15 psychology

Human soul subsists, created by God, immortal.

16 psychology

Soul is sole form, gives body being and perfection.

17 psychology

Soul’s powers. Organic powers (senses) subject = composites; Non-organic (intellect) subject = soul

18 psychology

Intellect is immaterial; distance from matter increases intellect.

19 psychology

Active intellect abstracts intelligible forms from senses.

20 psychology

Intellect knows universals; senses know particulars; spiritual by analogy.

21 psychology

Will follows intellect; chooses good based on judgment.

22 theodicy

God proven a posteriori as first cause and mover.

23 theodicy

God's essence is existence (exercised actuality); infinite perfection.

24 theodicy

God alone creates; no finite nature has creative power.