Egypt
Sadat, Anwar. Interview. New York Times, 9 Mar. 1978.
Athanasius of Alexandria. De Incarnatione [On the Incarnation]. c. 318.
Athanasius. On the Incarnation: Saint Athanasius. St. Vladimir's Serminary Press, 2012.
Plotinus. The Six Enneads. c. 270, bk. 2, treatise 3.
Plotinus. The Enneads, edited by Lloyd P. Gerson, translated by George Boys-Stones, et. al. Cambridge University Press, 2018, bk. 2, treatise 3.
Ptolemy, Claudius. Τετράβιβλος [Tetrabiblios]. c. 150, bk. 1.
Ptahhotep. The Maxims of Ptahhotep. c. 2375, maxim 1.
Amenemope. The Instruction of Amenemope. 11 century BC.
Amenemope. "The Instruction of Amenemope." The Literature of Ancient Egypt, edited by William Kelly Simpson, translated by Robert T. K. Ritner, William Kelly Simpson, Vincent A. Tobin, and Edward F. Wente, Jr. Yale University Press, 2003.
Ptahhotep. The Maxims of Ptahhotep. c. 2375, maxim 34.
Plotinus. The Six Enneads. c. 270, bk. 2, treatise 3.
Plotinus. The Enneads, edited by Lloyd P. Gerson, translated by George Boys-Stones, et. al. Cambridge University Press, 2018, bk. 2, treatise 3.
Ptahhotep. The Maxims of Ptahhotep. c. 2375, maxim 25.
Gaon, Saadia. كتاب الأمانات والاعتقادات [The Book of Beliefs and Opinions]. c. 933, introduction.
Gaon, Saadia. The Book of Beliefs and Opinions. Yale University Press, 1989, introduction.