Summa theologica

The Summa Theologica is a comprehensive work divided into three parts.

The first part deals with God, the creation of the world, angels, and the nature of man.

The second part is subdivided into two sections: the first part of the second part discusses general principles of morality and law, while the second part of the second part addresses morality in particular, including individual virtues and vices.

The third part, left unfinished by Aquinas, focuses on the person and work of Christ and the sacraments.

The work also includes a posthumous supplement that concludes the third part and discusses Christian eschatology.

Aquinas drew on Aristotelian and Augustinian influences and aimed to integrate faith and reason in his theological arguments.