Enlightened with Eternal Light: St. Macarius the Great 

St. Abba Macarius the Great (295-392 A.D.; also known as Macarius of Egypt) was among the most authoritative Desert Fathers of Egypt, and a disciple of St. Anthony the Great.
"Fifty spiritual homilies" of St. Macarius of Egypt is an authoritative patristic source. "The Homilies are well described as “spiritual” Homilies. That is their purpose and their character. They are not dogmatic; they are not controversial; they are not expository; they are not concerned with the politics or the expansion of the church; they have little to say about the Christian’s duty to his fellow-men. .. They have but one object, to help to bring individual souls to God in perfect self-subdual and absolute devotion." (from Orthodoxwiki)