Catholic apologetics with a strong emphasis on Scripture, Church history, and the Church Fathers. Particularly good for questions about the papacy, the Eucharist, sola Scriptura, salvation, and what the earliest Christians actually believed.
Apologetics, debates, moral theology, philosophy, and responses to objections to Christianity and Catholicism. Especially useful for learning how to reason through difficult questions and defend Catholic teaching on subjects such as abortion, atheism, Protestant objections, sexuality, and the existence of God.
Exceptionally broad Catholic apologetics covering Scripture, theology, Church history, canon law, liturgy, the Fathers, and unusual questions, including UFOs, that do not always get treated elsewhere. Particularly good at distinguishing what the Church actually teaches from theological opinion or popular Catholic assumptions.
Longer-form reflections and commentary on Catholicism, Christian culture, tradition, liturgy, masculinity, family life, and contemporary problems in the Church and society. More commentary-oriented than the apologetics channels above.
Accessible Catholic formation on prayer, Scripture, the sacraments, morality, relationships, discernment, confession, the Mass, and everyday Christian life. Fr. Mike Schmitz’s short explanations are particularly useful for questions that commonly arise when someone is learning or returning to the Faith.
Catholic philosophy and theology grounded especially in St. Thomas Aquinas. Excellent for going deeper into God, the soul, virtue, natural law, faith and reason, Christology, grace, morality, and the sacraments.
Aquinas 101 is an excellent free introduction to systematic Catholic philosophy and theology.
Scripture studied within Catholic Tradition, especially through Scott Hahn, John Bergsma, and other Catholic biblical scholars.
Particularly strong on:
More like a free Catholic adult-education program than an ordinary YouTube channel. Substantial lectures and courses in Scripture, theology, philosophy, Church history, spirituality, the Fathers, and Catholic culture.
Excellent for anyone who wants to move from introductory catechesis into serious, structured study.
Search YouTube for Archbishop Fulton J. Sheen’s talks and television programs; there is no single definitive channel containing his work.
His preaching is especially good on Christ, the Cross, conversion, sin, confession, marriage, the spiritual life, and the psychology of the moral life. His talks remain remarkably accessible despite their age.
Search YouTube or EWTN for Mother Angelica’s programs and talks; there is no single definitive YouTube channel for her work.
Her teaching is particularly strong on prayer, suffering, trust in God, repentance, holiness, spiritual warfare, and the practical difficulties of living the Catholic faith. Her style is simple, direct, frequently funny, and occasionally fiery.
Mother Angelica’s reaction to the 1993 World Youth Day Stations of the Cross
Probably the best first stop when you have a specific question about Catholic teaching. Thousands of articles, answers, videos, tracts, and discussions covering Scripture, doctrine, morality, sacraments, Church history, and apologetics.
Particularly useful when the question is simply:
“Why do Catholics believe X?”
An enormous free Catholic reference library. Highlights include the Catholic Encyclopedia, the writings of the Church Fathers, and the Summa Theologiae of St. Thomas Aquinas, along with many other historic Christian texts.
Especially valuable when you want to go beyond someone telling you what Augustine, Ignatius, Irenaeus, etc. believed and actually read the primary source.
Primarily a prayer and spiritual-life app. Its guided library brings together the Rosary, chaplets, Lectio Divina, the Ignatian Examen, novenas, and litanies, alongside daily readings, prayer challenges, Gregorian chant, and longer-form audio.
A substantial amount is free; the full library requires a subscription.
One of the best free Catholic formation apps available. It includes the entire RSV-2CE Bible and the entire Catechism of the Catholic Church for free, as well as prayers and much of Ascension’s audio content.
Some items require a subscription, but a large amount of the excellent content is free.
Its signature series—The Bible in a Year, The Catechism in a Year, The Rosary in a Year, and Catholic Classics—sit alongside the complete RSV-2CE Bible and Catechism, with transcripts, notes, references, study plans, saints, prayers, and Bible Timeline resources.
The relevant Scripture or Catechism text is integrated directly alongside many of the episodes.
Most of the additional study resources require a subscription.
Excellent free app for learning and praying the Liturgy of the Hours, the official daily prayer of the Church. It brings the Breviary, Missal, Lectionary, major Catholic prayers, and liturgical rites into one multilingual library, with Latin included.
Particularly useful if you want to begin with Morning Prayer, Evening Prayer, or Night Prayer without buying a physical breviary.
A completely free Catholic “Swiss Army knife.” It combines daily Mass readings and the Liturgy of the Hours with rosaries, chaplets, the Stations of the Cross, and preparation for confession. Its reference library includes the Catechism, saints, Catholic prayers, Vatican II texts, canon law, papal documents, and an offline Douay-Rheims Bible.
The interface is less polished than Hallow or Ascension, but the sheer amount of material available for free is excellent.
One of the earliest surviving Christian writings outside the New Testament, probably from the late first or early second century.
It gives a remarkably early picture of:
Very useful for seeing how closely early Christian practice resembles Catholic life.
New Advent’s large collection of writings from the early Church, including:
Especially useful when you want to read the primary sources instead of relying on quotations or summaries in apologetics material.
A verse-by-verse collection of commentary on the four Gospels assembled by St. Thomas Aquinas almost entirely from the Church Fathers.
It is an excellent way to see how ancient Christian writers interpreted Scripture and how different Fathers illuminate the same passage.
The Catena Aurea is a medieval compilation of excerpts, not a modern critical commentary and not a magisterial document.
Individual Fathers sometimes offer different or speculative interpretations, and Aquinas includes them to preserve the breadth of patristic exegesis.
It is best used for spiritual and theological enrichment, not as though every individual comment were itself a definitive Catholic interpretation.
A massive reference work covering:
Excellent for quickly getting historical and theological background on an unfamiliar term or topic.
It was published in the early twentieth century, so some historical scholarship and disciplinary information is dated, but it remains an extremely useful reference.
One of the greatest systematic works of Catholic theology. It treats subjects including:
It is enormously valuable, but it is also dense and assumes familiarity with philosophical and theological vocabulary.
For someone in OCIA, it is better treated as a resource to consult when a particular question becomes interesting rather than something that needs to be read straight through.
