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The Summa theologica is comprised of three main parts, the second being subdivided into two parts and a supplement being appended to the third part.
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Sacred Doctrine (1)
God (2–43)
God’s Existence (2)
God’s Perfections (3–26)
Trinity (27–43)
Creation (44–102)
Angels (50–64)
Six Days (65–74)
Man (75–102)
Divine Government (103–119)
Effects in Creation (103–106)
Angelic Order (107–114)
Corporeal Creatures / Man (115-119)
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First Part of the Second Part (QQ. 1–114)
Human Acts (1–48)
Happiness (1–5)
Voluntary and Involuntary Acts (6–48)
Habits (49–89)
Habits (49–54)
Virtues (55–67)
Gifts (68–70)
Vices (71–89)
Law (90–108)
Kinds of Law (90–97)
Old Law (98–105)
New Law (106–108)
Grace (109–114)
Necessity (109)
Nature, Cause, Effects (110–113)
Merit (114)
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Second Part of the Second Part (QQ. 1–189)
Theological Virtues (1–46)
Faith (1–16)
Hope (17–22)
Charity (23–46)
Cardinal Virtues (47–170)
Prudence (47–56)
Justice (57–122)
Fortitude (123–140)
Temperance (141–170)
Peculiar Acts (171–189)
Gratuitous Graces (171–178)
Active and Contemplative Life (179–182)
Various States of Life (183–189)
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Third Part (QQ. 1–90)
Incarnation (1–59)
Fitness (1)
Mode of Union (2–26)
Blessed Virgin (27–30)
Conception (31–34)
Life (35–45)
Passion (46–52)
Resurrection (53–56)
Ascension (57–59)
Sacraments (60–90)
General (60–65)
Baptism (66–71)
Confirmation (72)
Eucharist (73–83)
Penance (84–90)
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Supplement to the Third Part (QQ. 1–99)
Sacraments, cont. (1–68)
Penance, cont. (1–28)
Unction (29–33)
Order (34–40)
Matrimony (41–68)
Last Things (69–99)
Intermediate State (69–74)
Resurrection (75–87)
Judgment (88–90)
Heaven and Hell (91–99)
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The Summa contra gentiles is divided into four books, the third book being subdivided into two parts.
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Faith and Reason (1–12)
Existence of God (13)
Properties of God (14–102)
Book Two: Creation (Ch. 1–101)
God and Creation (1–45)
Intellectual Substance (46–55)
Intellectual Substance and Body (56–90)
Separate Substances (91–101)
Book Three: Providence (Ch. 1–83)
God the End of All (1–63)
Final Causality (1)
Teleology and Act (2–3)
Evil and Act (4–15)
God and Act (16–25)
Human Happiness (26–44)
Knowledge of Separate Substances (45–50)
The Beatific Vision (51–63)
God the Governor of All (64–163)
Divine Providence (64–76)
Providence and Secondary Causes (77–82)
Hierarchy of Causes (83)
Book Three: Providence (Ch. 84–163)
Causal Relations and Human Acts (84–113)
God’s Law and Human Ends (114–146)
God’s Grace and Human Happiness (147–163)
Book Four: Salvation (Ch. 1–97)
Divine Revelation and Human Happiness (1)
Divine Generation (2–14)
Holy Spirit (15–25)
Trinity (26)
Incarnation (27–55)
Sacraments (56–78)
Last Things and Human Ends (79–97)
