The work includes a number of quotations from standard authors such as the Cappadocians, John Chrysostom and Cyril of Alexandria, and also Pseudo-Dionysius, but also from a number of authors condemned at various councils (e.g. Apollinarius, Eunomius, Eutyches, Nestorius, Paul of Samosata, Valentinian).
Clement of Alexandria, John Chrysostom, and the Cappadocians (Basil of Caesarea and Gregory of Nazianzus especially) are strongly represented, but a section is also devoted to Western spiritual writers such as Bernard of Clairvaux.