 The monastic literature on mystical ascent developed introspective analysis of subjective feeling, which Bernard of Clairvaux called the sense of being affected by divine action (sentit intra se actitari, Opera II, 10, 28–29; Köpf 1980: 136–174). Many later theologians such as Albert the Great and Thomas Aquinas wrote commentaries on the Pseudo-Dionysius’s works (late fifth century), which taught on mystical experience from the point of view of Christian Neoplatonism. (For ancient Christian discussions, see Hadot 1995; Knuuttila 2004; for Augustine, see also Byers 2013; Gao 2018; for Gregory the Great, see Straw 1988; Humphries 2013; for medieval commentaries of Pseudo-Dionysius, see Coakley and Stang (eds., 2009); Blankenhorn 2015.