Augustine of Hippo, On the Holy Trinity IX.9: In the Love of Spiritual Things the Word Born is the Same as the Word Conceived. It is Otherwise in the Love of Carnal Things

Chapter 9.—In the Love of Spiritual Things the Word Born is the Same as the Word Conceived. It is Otherwise in the Love of Carnal Things.

14. But the word conceived and the word born are the very same when the will finds rest in knowledge itself, as is the case in the love of spiritual things. For instance, he who knows righteousness perfectly, and loves it perfectly, is already righteous; even if no necessity exist of working according to it outwardly through the members of the body. But in the love of carnal and temporal things, as in the offspring of animals, the conception of the word is one thing, the bringing forth another. For here what is conceived by desiring is born by attaining. Since it does not suffice to avarice to know and to love gold, except it also have it; nor to know and love to eat, or to lie with any one, unless also one does it; nor to know and love honors and power, unless they actually come to pass. Nay, all these things, even if obtained, do not suffice. “Whosoever drinketh of this water,” He says, “shall thirst again.” And so also the Psalmist, “He hath conceived pain and brought forth iniquity.” And he speaks of pain or labor as conceived, when those things are conceived which it is not sufficient to know and will, and when the mind burns and grows sick with want, until it arrives at those things, and, as it were, brings them forth. Whence in the Latin language we have the word “parta” used elegantly for both “reperta” and “comperta,” which words sound as if derived from bringing forth. Since “lust, when it hath conceived, bringeth forth sin.” Wherefore the Lord proclaims, “Come unto me all ye that labor and are heavy laden;” and in another place “Woe unto them that are with child, and to them that give suck, in those days!” And when therefore He referred all either right actions or sins to the bringing forth of the word, “By thy mouth,” He says, “thou shalt be justified, and by thy mouth thou shalt be condemned,” intending thereby not the visible mouth, but that which is within and invisible, of the thought and of the heart.