“Divine Providence permits many heretics with their differing errors so that at least, when they insult us and ask us what we do not know, we may shake off our sluggishness and long to know the divine Scriptures. This is why the Apostle says [in 1 Corinthians 11:19], ‘It is necessary that there be heresies in order that those who are approved among you might become manifest.’ For those are approved before God who can teach well, but they can only become manifest to men when they teach. They are, however, willing to teach only those who seek to be taught. Yet many are slow to seek if they are not aroused as if from sleep by the troublesomeness and insults of the heretics. Then, embarrassed over their ignorance, they perceive that they are in danger because of that ignorance. If these are men of solid faith, they do not give in to the heretics, but carefully seek what response they should make to them. God does not abandon them. When they ask, they receive, and when they seek, they find, and when they knock, the door will be opened for them” (Augustine, On Genesis, Against the Manichees, I.1.2).
God allows false teaching to motivate true believers to seek the truth and to manifest teachers whom Christ has given His Church.
There is plenty of false teaching, and it is extremely popular. Our small groups shouldn’t be so small, our Sunday Schools should be bursting with students desirous for God’s truth, our Bible studies ought to be crowded, our Bibles should be wearing out faster than our phones, our prayer meetings’ requests should be for knowledge of God above all, our services filled with humble hunger for a Word from the Lord, and the local church should be the vital seed-bed (the meaning of the word “seminary”) for teachers manifested by God to confront the staggering amount of falseness being marketed to Christians. Teachers should be showing their legitimacy as manifestations of God’s provision to His Church by ever honing their craft, their art, their passion, their accuracy, their communication, and their Spirit-wrought authoritative power.
“Should be.” “Ought.”
The heresies are plentiful, Lord. Please, please, please manifest those approved in the teaching and learning ministry of Your precious Church.
“I write so that you will know how one ought to conduct himself in the household of God, which is the church of the living God, the pillar and support of the truth” (1 Timothy 3:15).
 Augustine is meditating on 1 Corinthians 11:19, “there must also be factions [αἱρέσεις] among you, so that those who are approved may become evident among you.” Αἵρεσις is translated “heresy” (its English cognate) by Wycliffe, and in the Geneva Bible and King James Version.