Liber de Causis (The Book of Causes)

B. Coordination or Interdependence of Causes [Props. 16–32]

1. How lower causes depend from higher causes [Props. 16–19]
2. How higher causes flow over into lower causes [Props. 20–23]
3. How lower causes diversely receive the influence from the First Cause [Props. 24–32]

A. Distinctions Concerning First Causes [Props. 2–15]

1. Division of First Causes: [Props. 2–5]
a) Division into three grades: [Prop. 2]
(1) First Cause = God
(2) Intelligences
(3) Souls