Isaiah the Solitary

Saint Isaiah the Solitary
Abba
Died	491 AD Gaza
Venerated in	Eastern Orthodox Church Oriental Orthodox Church Roman Catholic Church
Feast	3 July
Tradition or genre	Desert Fathers

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Isaiah the Solitary (? – 11 August 491), also known as Isaiah of Gaza, Isaias the Solitary, Abba Isaiah, or possibly also Isaiah of Scetis, was a Christian ascetic and monastic writer known from the Sayings of the Desert Fathers and various Palestinian Miaphysite sources. He is canonized as a saint by the Coptic Orthodox Church, with his feast day on the 11th day of the month Abib (Epip) in the Coptic calendar.

His work "On Guarding the Intellect" can be found in the Philokalia.