Teaching and Sayings
The synaxarion preserves two anecdotes attributed to Achilles. In the first, he encountered Abba Isaiah, who was consuming palm leaves mixed with salt and water on account of an intense, heat-induced thirst. Achilles used the occasion to instruct other monks on maintaining strict dietary discipline, warning them not to imitate such a lapse even under duress.
In the second, when Achilles was grieved by a brother's words, he prayed that God would remove from him the remembrance of that word, and ultimately attained interior peace through this practice. The synaxarion presents the episode as an illustration of his teaching on non-remembrance of wrongs.
These accounts follow the form of the chriae found throughout the Apophthegmata Patrum: brief teaching encounters between an elder and a visitor or disciple.
Historical Context
Scetis (Wadi El Natrun) in Egypt was the principal locus of 5th-century Egyptian desert monasticism, inhabited by major Desert Fathers including Anthony the Great, Macarius of Egypt, Arsenius, and John Cassian. The region suffered devastating raids by the Mazices in 407-408, causing many notable fathers to scatter, with further raids in 434, 444, and 570.
Saint Arsenius the Great is recorded as lamenting around 410: 'The world has lost Rome and the monks have lost Scetis.' Despite these disruptions, the communities regrouped, and Scetis became the most important center of Coptic monasticism in Egypt. A 5th-century anchorite such as Achilles would have been active amid this turbulent but spiritually formative period. No named reference to Achilles appears in the broader historiographical record of Scetis, consistent with his being a lesser-known figure whose name was preserved chiefly in the Apophthegmata.
Liturgical Commemoration
Achilles is named in the third Troparion of Ode One of the Canon for Saturday of Cheesefare Week, where he is mentioned together with Saint Ammoun: 'Achilles and Ammoun, the flowers of the desert.' This is evidence of his lasting liturgical commemoration alongside another Egyptian desert father.
Relics & Shrines
The synaxarion states simply that Saint Achilles reposed in peace and provides no burial location, relics, or shrine information.