[1] Only two of Constantine's works survive, both written in Greek and preserved in the 13th-century codex Escorialensis graecus 256 (olim Y.II.10).
Constantine praises Doukas' wife for her ascetic virtues, which he calls "real philosophy", as opposed to the academic kind he pursues.
[4] Constantine demonstrates a certain originality of thought in his use of philosophical terms not attested elsewhere: εὐμεταδοσία (eumetadosia, generosity) and ἀλληλοδοσία (allelodosia, reciprocity).
[1] His central claim is that, in the words of Merle Eisenberg and David Jenkins, "reciprocated generosity is the fundamental principle at work in Nature.
John Doukas was possibly a patron and he may have belonged to the school of adherents of Proclus attacked by Nicholas of Methone in the 1150s.