Summa Theologiae, Thomas Aquinas synthesis of theology and metaphysics
Fishburn and Hughes: "One of the most important texts of the Christian Church in which Aquinas (1225-1274) systematises and defines the theology of the Christian faith. Divided in three parts, each of about 1,500 pages, it discusses the nature of God, angels and man, the divine government of human acts and the state of grace (part 1); the theological and cardinal virtues (part 2); and the incarnation and resurrection of Christ and the sacraments (part 3). The material is arranged under different 'questions', each divided into 'articles' headed under a statement and presenting the objections to it, which are contested one by one. Reference to the question 'whether God can make the past not to have been', which Aquinas answers in the negative, his principal reason being that changing the past would imply a contradiction and as such a diminution of God's power (part 1, q.25, art.4)." (188)