Plato
Philo
Plotinus
Origen
Nicene orthodoxy: Athanasius ; Gregory of Nyssa
The monastic contribution: Evagrius of Pontus ; the Macarian Homilies ; Diadochus of Photicē
Augustine
Denys the Areopagite
Patristic mysticism and St. John of the Cross ; Divine darkness and the dark night
The mystical life and the mystical body: Platonism and mysticism ; the communion of saints.
The origins of the Christian mystical tradition : from Plato to Denys by Andrew Louth. ISBN 9780199291403. Published by Oxford University Press in 2007. Publication and catalogue information, links to buy online and reader comments.