1. Plato, ; Book X
2. Aristotle, 9; V.5, IX.8; II.4–6
3. Lucretius, , Book II
4. Plotinus, VI.8
5. Augustine, V;
6. Aquinas, I, Q. 2 (Third Way); Q. 14, A. 13; Q. 19, A. 3
7. Spinoza, , Part I
8. Leibniz, ; ;
9. Hume, , Sections VII–VIII
10. Kant, , Second Analogy; Antinomies
11. Hegel, , Doctrine of Essence (Actuality)