“Donatism was the error taught by Donatus, bishop of Casae Nigrae, that the effectiveness of the sacraments depends on the moral character of the minister. In other words, if a minister who was involved in a serious enough sin were to baptize a person, that baptism would be considered invalid.
Donatism developed as a result of the persecution of Christians ordered by Diocletian in 303 in which all churches and sacred Scriptures of the Christians were to be destroyed. In 304 another edict was issued ordering the burning of incense to the idol gods of the Roman empire. Of course, Christians refused, but it did not curtail the increased persecution. Many Christians gave up the sacred texts to the persecutors and even betrayed other Christians to the Romans. These people became known as “traditors,” Christians who betrayed other Christians. (Note: traditor, not traitor).
At the consecration of bishop Caecilian of Carthage in 311, one of the three bishops, Felix, bishop of Aptunga, who consecrated Caecilian, had given copies of the Bible to the Roman persecutors. A group of about 70 bishops formed a synod and declared the consecration of the bishop to be invalid. Great debate arose concerning the validity of the sacraments (baptism, the Lord’s Supper, etc.,) by one who had sinned so greatly against other Christians.
After the death of Caecilian, Aelius Donatus the Great became bishop of Carthage, and it is from his name that the movement is called. The Donatists were gaining “converts” to their cause, and a division was arising in the Catholic church. They began to practice rebaptism which was particularly troublesome to the church at the time and was condemned at the Synod of Arles in 314 since it basically said the authority in the Catholic church was lost.
The Donatist issue was raised at several ecumenical councils and finally submitted to Emperor Constantine in 316. In each case the consecration of bishop Caecilian was upheld. However, persecution fuels emotions, and by 350 the Donatists had gained many converts and outnumbered the Orthodox in Africa. But it was the apologetic by Augustine that turned the tide against the Donatist movement which eventually died out in the next century.
The problem with Donatism is that no person is morally pure. The effectiveness of the baptism or administration of the Lord’s supper does not cease to be effective if the moral character of the minister is in question or even demonstrated to be faulty. Rather, the sacraments are powerful because of what they are–visible representations of spiritual realities. God is the one who works in and through them, and He is not restricted by the moral state of the administrant.”
Summa Catechetica, "Neque enim quaero intelligere ut credam, sed credo ut intelligam." – St Anselm, "Let your religion be less of a theory, and more of a love affair." -G.K. Chesterton, "I want a laity, not arrogant, not rash in speech, not disputatious, but men and women who know their religion, who enter into it, who know just where they stand, who know what they hold and what they do not, and who know their creed so well that they can give an account of it."- Bl John Henry Newman, Cong. Orat., "Encounter, not confrontation; attraction, not promotion; dialogue, not debate." -cf Pope Francis, “You will not see anyone who is really striving after his advancement who is not given to spiritual reading. And as to him who neglects it, the fact will soon be observed by his progress.” -St Athanasius, "To convert someone, go and take them by the hand and guide them." -St Thomas Aquinas, OP. 1 saint ruins ALL the cynicism in Hell & on Earth. “When we pray we talk to God; when we read God talks to us…All spiritual growth comes from reading and reflection.” -St Isidore of Seville, “Also in some meditations today I earnestly asked our Lord to watch over my compositions that they might do me no harm through the enmity or imprudence of any man or my own; that He would have them as His own and employ or not employ them as He should see fit. And this I believe is heard.” -GM Hopkins, SJ, "Only God knows the good that can come about by reading one good Catholic book." — St. John Bosco, "Why don't you try explaining it to them?" – cf St Peter Canisius, SJ, Doctor of the Church, Doctor of the Catechism, "Already I was coming to appreciate that often apologetics consists of offering theological eye glasses of varying prescriptions to an inquirer. Only one prescription will give him clear sight; all the others will give him at best indistinct sight. What you want him to see—some particular truth of the Faith—will remain fuzzy to him until you come across theological eye glasses that precisely compensate for his particular defect of vision." -Karl Keating, "The more perfectly we know God, the more perfectly we love Him." -St Thomas Aquinas, OP, ST, I-II,67,6 ad 3, “But always when I was without a book, my soul would at once become disturbed, and my thoughts wandered." —St. Teresa of Avila, "Let those who think I have said too little and those who think I have said too much, forgive me; and let those who think I have said just enough thank God with me." –St. Augustine, "Without good books and spiritual reading, it will be morally impossible to save our souls." —St. Alphonsus Liguori "Never read books you aren't sure about. . . even supposing that these bad books are very well written from a literary point of view. Let me ask you this: Would you drink something you knew was poisoned just because it was offered to you in a golden cup?" -St. John Bosco " To teach in order to lead others to faith is the task of every preacher and of each believer." —St. Thomas Aquinas, OP