This is unfortunate because, from his extant works, it can clearly be seen that he possessed a superior mind, and quite dexterous in both philosophy and theology.

His method and style, both of teaching and of writing, were decidedly in the line of Aristotelic-Thomist Scholasticism.

Unfortunately, no manuscript of Hagius has ever been transliterated, much less translated into any modern language, or even freshly read and studied.

Though all of his works basically deal with theological subjects, Hagius consistently examines them from a philosophical point of view, seeking to give sound philosophical basis to his arguments.

These are Tractatus De Sacramento Eucharistiæ ("A Study on the Sacrament of Eucharist; 1710),[2] and Tractatus De Adorando SSme Trinitatis Misterio ("A Study on the Worship given to the Most Holy Mystery of the Trinity; 1711).