The Summa Theologica (or the Summa Theologiae or simply the Summa, written 1265-1274) is the most famous work of Thomas Aquinas (c. 1225-1274) although it was never finished. It was intended as a manual for beginners and a compilation of all of the main theological teachings of that time. It summarizes the reasoning for almost all points of Christian theology in the West, which, before the Protestant Reformation, subsisted solely in the Roman Catholic Church. The Summa's topics follow a cycle: the existence of God, God's creation, Man, Man's purpose, Christ, the Sacraments, and back to God. (Summary adapted from the Wikipedia)
Chapters
1 Question 49 - OF HABITS IN GENERAL, AS TO THEIR SUBSTANCE (In Four Articles) 35 min 2 Question 50 - OF THE SUBJECT OF HABITS (In Six Articles) 43 min 3 Question 51 - OF THE CAUSE OF HABITS, AS TO THEIR FORMATION (In Four Articles) 26 min 4 Question 52 - OF THE INCREASE OF HABITS (In Three Articles) 28 min 5 Question 53 - HOW HABITS ARE CORRUPTED OR DIMINISHED (In Three Articles) 22 min 6 Question 54 - OF THE DISTINCTION OF HABITS (In Four Articles) 25 min 7 Question 55 - OF THE VIRTUES, AS TO THEIR ESSENCE (In Four Articles) 29 min 8 Question 56 - OF THE SUBJECT OF VIRTUE (In Six Articles) 38 min 9 Question 57 - OF THE INTELLECTUAL VIRTUES (In Six Articles) 43 min 10 Question 58 - OF THE DIFFERENCE BETWEEN MORAL AND INTELLECTUAL VIRTUES (In Five Articles) 33 min 11 Question 59 - OF MORAL VIRTUE IN RELATION TO THE PASSIONS (In Five Articles) 29 min 12 Question 60 - HOW THE MORAL VIRTUES DIFFER FROM ONE ANOTHER (In Five Articles) 36 min 13 Question 61 - OF THE CARDINAL VIRTUES (In Five Articles) 34 min 14 Question 62 - OF THE THEOLOGICAL VIRTUES (In Four Articles) 23 min 15 Question 63 - OF THE CAUSE OF VIRTUES (In Four Articles) 25 min 16 Question 64 - OF THE MEAN OF VIRTUE (In Four Articles) 25 min 17 Question 65 - OF THE CONNECTION OF VIRTUES (In Five Articles) 36 min 18 Question 66 - OF EQUALITY AMONG THE VIRTUES (In Six Articles) 44 min 19 Question 67 - OF THE DURATION OF VIRTUES AFTER THIS LIFE (In Six Articles) 43 min 20 Question 68 - OF THE GIFTS (In Eight Articles) 1 h 4 min 21 Question 69 - OF THE BEATITUDES (In Four Articles) 35 min 22 Question 70 - OF THE FRUITS OF THE HOLY GHOST (In Four Articles) 28 min 23 Question 71 - OF VICE AND SIN CONSIDERED IN THEMSELVES (In Six Articles) 41 min 24 Question 72 - OF THE DISTINCTION OF SINS (In Nine Articles) 58 min 25 Question 73 - OF THE COMPARISON OF ONE SIN WITH ANOTHER (In Ten Articles), part 1 31 min 26 Question 73 - OF THE COMPARISON OF ONE SIN WITH ANOTHER (In Ten Articles), part 2 34 min 27 Question 74 - OF THE SUBJECT OF SIN (In Ten Articles), part 1 31 min 28 Question 74 - OF THE SUBJECT OF SIN (In Ten Articles), part 2 33 min 29 Question 75 - OF THE CAUSES OF SIN, IN GENERAL (In Four Articles) 24 min 30 Question 76 - OF THE CAUSES OF SIN, IN PARTICULAR (In Four Articles) 29 min 31 Question 77 - OF THE CAUSE OF SIN, ON THE PART OF THE SENSITIVE APPETITE (In Eight Articles) 51 min 32 Question 78 - OF THAT CAUSE OF SIN WHICH IS MALICE (In Four Articles) 27 min 33 Question 79 - OF THE EXTERNAL CAUSES OF SIN (In Four Articles) 26 min 34 Question 80 - OF THE CAUSE OF SIN, AS REGARDS THE DEVIL (In Four Articles) 25 min 35 Question 81 - OF THE CAUSE OF SIN, ON THE PART OF MAN (In Five Articles) 37 min 36 Question 82 - OF ORIGINAL SIN, AS TO ITS ESSENCE (In Four Articles) 24 min 37 Question 83 - OF THE SUBJECT OF ORIGINAL SIN (In Four Articles) 26 min 38 Question 84 - OF THE CAUSE OF SIN, IN RESPECT OF ONE SIN BEING THE CAUSE OF ANOTHER (In Four Articles) 29 min 39 Question 85 - OF THE EFFECTS OF SIN, AND FIRST, OF THE CORRUPTION OF THE GOOD OF NATURE (In Six Articles) 41 min 40 Question 86 - OF THE STAIN OF SIN (In Two Articles) 11 min 41 Question 87 - OF THE DEBT OF PUNISHMENT (In Eight Articles) 54 min 42 Question 88 - OF VENIAL AND MORTAL SIN (In Six Articles) 46 min 43 Question 89 - OF VENIAL SIN IN ITSELF (In Six Articles) 39 min
