The article considers the theological aspects of faith in the Great Canon of Andrew of Crete. The purpose is to identify St. Andrew’s theological conception of faith and its characteristics in the context of the Great Canon theology through the analysis of traditional Orthodox exegesis of some Old Testament stories, mentioned in the Canon. Three biblical plots are examined in detail: leaving his native land Haran by Abraham, sacrificing Isaac by Abraham, Babylonian pandemonium. The traditional exegesis treats the first two stories as examples of solid faith, the last one is an illustration of unbelief and disobedience. The interpretations and opinions of Philo of Alexandria, Clement of Alexandria, Origen, Justin Martyr, Irenaeus of Lyon, Ambrose of Milan, Antony the Great, Titus Flavius Josephus, Basil the Great, Gregory of Nyssa, Didymus the Blind, John Cassian, Abba Paphnutius, Cyril of Alexandria, Caesarius of Arles, Thalassius of Libya, Serapion of Thmuis, Maximus the Confessor, John Climacus, John Chrysostom, Ephraim the Syrian are referred to in the article in order to substantiate St. Andrew’s interpretation of the three biblical stories. The theological conception of faith in exegetics is represented in a deeply symbolic, allegorical form. Eastern Orthodox Church Fathers, especially the representatives of Alexandrian Theological School (Clement of Alexandria, Origen, Anthony the Great, Cyril of Alexandria, Didymus the Blind) extensively used allegories for exegesis. The author of the Great Canon thinks faith to be a process. Faith accompanies the human soul in its way of repentance, which is the main topic of the Canon sometimes called ‘Penitential’. The penitent human soul swings to and from Abraham’s steadfast faith. Its different states are allegorically illustrated by biblical stories.