Opera latina XXXI (12-15)

Lullus' Quattuor libri principiorum were developed from the Ars compendiosa inueniendi ueritatem. They were probably written in the period ca. 1274-1283. In these four books we find the main rules of Lullian Art in an early stage, as a muster of Lullus'universal knowledge system. These books are here set together to show the unity of method for theology, philosophy and justice. The traditional matters about medicine are explained with the existing logical constraints taken into account. The chapters on generation and corruption, fever, urine and pulse show the current theory of humours and the optimal levels of the four natural elements, preventive treatments, and the means to recover from illness. The book Principia medicinae is the only one that has parallel textual Catalan tradition.

Raimundus Lullus — Liber principiorum iuris (op. 14) — ed. M.A. Sánchez Manzano

Raimundus Lullus — Liber principiorum medicinae (op. 15) — ed. M.A. Sánchez Manzano

Raimundus Lullus — Liber principiorum philosophiae (op. 13) — ed. M.A. Sánchez Manzano

Raimundus Lullus — Liber principiorum theologiae (op. 12) — ed. M.A. Sánchez Manzano