St. Ambrose, Concerning Virginity, Book 1, Chapter 1: “1. If, according to the decree of heavenly truth, we have to give account of every idle word which we have spoken, (Matthew 12:36) and if every servant will incur no small blame when his lord returns, who, either like a timid money-lender or covetous owner, has hidden in the earth the talents of spiritual grace which were entrusted to him in order that they might be multiplied by increasing interest, I, who, although possessed of but moderate ability, yet have a great necessity laid on me of making increase of the sayings of God entrusted to me, must rightly fear lest an account of the profit of my words be demanded of me, especially seeing that the Lord exacts of us effort, not profit. Wherefore I determined to write something, since, too, my words are listened to with greater risk to modesty than when they are written, for a book has no feeling of modesty.

2. And so distrusting indeed my own ability, but encouraged by the instances of divine mercy, I venture to compose an address, for when God willed even the donkey spoke. (Numbers 22:28) And I will open my mouth long dumb, that the angel may assist me also, engaged in the burdens of this world, for He can do away with the hindrances of unskilfulness, Who in the donkey did away those of nature. In the ark of the Old Testament the priest’s rod budded; (Numbers 17:8) with God it is easy that in Holy Church a flower should spring from our knots also. And why should we despair that God should speak in men, Who spoke in the thorn bush? (Exodus 3:4) God did not despise the bush, and would He might give light also to my thorns. Perhaps some may wonder that there is some light even in our thorns; some our thorns will not burn; there will be some whose shoes shall be put off their feet at the sound of my voice, that the steps of the mind may be freed from bodily hindrances.”