5. Research Work

He has been involved from his student years until today in research into dogmatic, theological and historical subjects.

As a student in the period 1964-1968 he took part, under the supervision of the Professor of Patristics at the Theological School of Thessaloniki, Panagiotis Christou, in two research programmes:

Firstly, in examining and recording manuscripts in the libraries of the Monasteries on the Holy Mountain.

Secondly, in the critical edition of the works of St Gregory Palamas.

Subsequently he researched and studied almost all the ecclesiastical patristic literature and indexed about 20,000 subjects and passages from the Fathers of the Church from the 4th to the 18th century, becoming familiar with almost the whole of patristic literature.

He also studied the Acts of the Ecumenical Councils, the faith and its presuppositions in connection with the philosophical currents of their era.

He studied all the works of the dogmatic theologian and historian Fr John Romanides, not only from his writings, but from his spoken teaching to the students at the Theological School of Thessaloniki and from his talks to various audiences, which he recorded, put in order and published in four books, with comments on his theology.

He studied the difference between the Orthodox Church and theology and other religious beliefs: Judaism, Eastern religions and Islam 

At the same time he studied pre-Socratic philosophy (6th to 5th century BC), the classical metaphysics of Socrates, Plato and Aristotle (5th to 4th century BC), the philosophies of the Hellenistic period, Epicurean and Stoic philosophy (3rd to 1st century BC), and the Neoplatonism of later antiquity (3rd to 6th century AD) in relation to the theology of the holy Fathers.

He also studied the difference between Orthodox theology and other theological, philosophical and existential views of the second Christian millennium, including Scholasticism (11th to 13th century), Nominalism (14th century), the Renaissance (15th century), the Reformation (16th century), the Enlightenment (17th to 18th century), German Idealism (19th century), Existentialism (20th century), Neo-Thomism (19th to 20th century), and how, starting from Modernism, we have reached Post-Modernism (20th to 21st century).

In particular he studied the philosophy of the existentialist philosopher Martin Heidegger (1889-1976), the existentialist psychology of Viktor Frankl (1905-1997) and the sociology of Max Weber (1864-1920), who in many respects represent the mentality of modern Europe.

In addition, he identified the difference, and the means of collaboration, between Orthodox theology and general science, medical science, biotechnology, bioethics, psychology-neurology-psychiatry, and digital technology.

As a result of all this research he has written 126 books to date, to which reference will be made below.