"But for the searching and right understanding of the Scriptures there is need of a good life and a pure soul, and for Christian virtue to guide the mind to grasp, so far as human nature can, the truth concerning God the Word. One cannot possibly understand the teaching of the saints unless one has a pure mind and is trying to imitate their life. Anyone who wants to look at sunlight naturally wipes his eye clear first, in order to make, at any rate, some approximation to the purity of that on which he looks; and a person wishing to see a city or country goes to the place in order to do so. Similarly, anyone who wishes to understand the mind of the sacred writers must first cleanse his own life, and approach the saints by copying their deeds. Thus united to them in the fellowship of life, he will both understand the things revealed to them by God and, thenceforth escaping the peril that threatens sinners in the judgment, will receive that which is laid up for the saints in the kingdom of heaven."
- St. Athanasius, De Incarnatione Verbi Dei