I found this on the blog Mystagogy, one of my favorites.

‘Below are some excerpts from St. John Chrysostom, found throughout his writings, that deal with the relationship between Faith and Reason. For St. John, there is not a contradiction between Faith and Reason when used for their own purpose, since both are gifts of God, but he does demonstrate and drive home strongly that Faith is far superior to Reason. Moreover he continuously warns against misusing Reason to be an enemy of Faith.

Reasoning should not interfere in matters of Faith, because Reason cannot even hope to comprehend the transcendent nature of Faith.

Reason cannot enlighten Faith, but Faith can enlighten Reason. Reason diminishes Faith because it limits it and does not allow it to grow. And Faith that does not increase eventually withers and dies. At the same time Reason unenlightened by Faith is like being born and raised in a dark prison cell, confined and unaware of the world beyond your limited experience. Reason can never move us beyond its own ignorance and it serves its purpose only when it drives a person to deeper Faith.’ – John Sanidopoulos.

“In that God has bestowed upon us benefits that surpass man’s reasoning, suitably enough He has brought in faith. It is not possible to be steadfast when demanding reasons. For behold all of our noble doctrines – how destitute they are of reasoning, and dependent upon faith alone. For example, God is not anywhere, and is everywhere. What has less reason in it than this? Each – by itself – is full of difficulty. … He was not made, He made not Himself, He never began to be. What reasoning will receive this, if there be not faith?” Read more

by St. Irenaeus of Lyons

The holy and glorious, right-victorious Hieromartyr Irenaeus of Lyons (c. 130-202) was bishop of Lugdunum in Gaul, which is now Lyons, France. His writings were formative in the early development of Christian theology. He was a disciple of Polycarp of Smyrna, who himself was a disciple of the Apostle John the Theologian. His feast day is August 23.

This is an excerpt of his masterwork, Against Heresies, Book I.

1. The Church, though dispersed through our the whole world, even to the ends of the earth, has received from the apostles and their disciples this faith: [She believes] in one God, the Father Almighty, Maker of heaven, and earth, and the sea, and all things that are in them; and in one Christ Jesus, the Son of God, who became incarnate for our salvation; and in the Holy Spirit, who proclaimed through the prophets the dispensations of God, and the advents, and the birth from a virgin, and the passion, and the resurrection from the dead, and the ascension into heaven in the flesh of the beloved Christ Jesus, our Lord, and His [future] manifestation from heaven in the glory of the Father Read more