many heresies, that they which are approved
the Holy Spirit together made all things and every particular thing. For every thing, substance, essence or nature, or whatever better word there may be, possesses at once these three qualities: it is a particular thing; it is distinguished from other things by its own proper form; and it does not transgress the order of nature. viii, 14. When this is known it will be as clear as it can be to men that all things are subject by necessary, indefeasible and just laws to their Lord God. Hence all those things which to begin with we simply believed, following authority only, we come to understand. Partly we see them as certain, partly as possible and fitting, and we become sorry for those who do not believe them, and have preferred to mock at us for believing rather than to share our belief. The Holy Incarnation, the birth from a virgin, the death of the Son of God for us, his resurrection from the dead, ascension into heaven and sitting at the right hand of the Father, the forgiveness of sins, the day of judgment, the resurrection of the body are not merely believed, when the eternity of the Trinity and the mutability of created things are known. They are also judged to be part and parcel of the mercy of the most high God, which he has shown towards the human race.
15. It has been truly said: "There must be many heresies, that they which are approved may be made manifest among you"
St. Augustine 11:19). Let us also make use of that gift of divine providence. Men become heretics who would have no less held wrong opinions even within the Church. Now that they are outside they do us more good, not by teaching the truth, for they do not know it, but by provoking carnal Catholics to seek the truth and spiritual Catholics to expound it. There are in the Holy Church innumerable men approved by God, but they do not become manifest among us so long as we are delighted with the darkness of our ignorance, and prefer to sleep rather than to behold the light of truth. So, many are awakened from sleep by the heretics, so that they may see God's light and be glad.
Let us therefore use even heretics, not to approve their errors, but to assert the Catholic discipline against their wiles, and to become more vigilant and cautious, even if we cannot recall them to salvation. ix, 16.
I believe that God will lend us his aid so that Scripture, being read by good men inspired by piety, may avail not against one false and bad opinion only but against all. But chiefly it is set against those who think that there are two natures or substances at war with one another, each with its own principle.
Some things they like and others they dislike, and they will have God to be the author of the things they like, but not of those they dislike.
When they cannot overcome temptation and are snared in carnal traps, they think there are two souls in one body, one from God and sharing his nature, the other from the race of darkness which God neither begat, nor made, nor produced, nor cast from him; which has its own independent life, its territory, its offspring and living things, in short its kingdom and unbegotten principle. At a certain time it rebelled against God, and God, having no other resource and finding no other means of resisting the enemy, under dire necessity, sent the good soul hither, a particle of his substance.
They fondly imagine that the enemy was subdued and the world fabricated by this soul becoming mixed up with the elements of darkness.
am not now refuting their opinions, partly because I have already done so and partly because I intend to do so again, if God permit. In this work I am showing as far as I can with the arguments God deigns to supply, how secure the Catholic faith is against them, and how the things which move men to give in to their opinions need not disturb the mind.
You know my mind very well, and I want you above all to believe firmly that I do not make this solemn declaration with an arrogance which ought to be avoided. I say, whatever error is to be found in this book it alone is to be attributed to me. Whatever is truly and suitably expounded I owe entirely to God, the giver of all good gifts. x, 18. Let it be clearly understood that there