Way of the Fathers

St. Irenaeus of Lyons (c. 125 - 202) was the first true theologian after the apostles. He was the first to clearly articulate the doctrine of consubstantiality: that the Father and the Son are of the same divine substance, are the same divinity, and are equally eternal.
Links
For a general introduction to St. Irenaeus of Lyons, See Mike Aquilina's episode 10 of this podcast: https://www.catholicculture.org/commentary/irenaeus-lyon-putting-smack-down-on-heresy/
The Letter of the Churches of Vienne and Lyons to the Churches of Asia and Phrygia:  https://www.earlychristianwritings.com/text/viennalyons.html
Irenaeus of Lyons, The Demonstration of the Apostolic Preaching: https://www.tertullian.org/fathers/irenaeus_02_proof.htm
The episode on docetism: https://www.catholicculture.org/commentary/43-heresies-docetics-s-humanity/
The episode on gnosticism: https://www.catholicculture.org/commentary/45-heresies-gnosticism-christ-as-cosmic-mind/
The episode on modalism: https://www.catholicculture.org/commentary/47-heresies-modalism-god-as-monad-with-three-names/
SIGN UP for Catholic Culture's Newsletter:  https://www.catholicculture.org/newsletters/
DONATE at:  http://www.catholicculture.org/donate/audio
For more on this Doctor of the Church, in historical context, see Dr. Papandrea's book - Reading the Church Fathers: A History of the Early Church and the Development of Doctrine: https://sophiainstitute.com/product/reading-the-church-fathers/
Dr. Papandrea's YouTube channel, The Original Church: https://www.youtube.com/@TheOriginalChurch
Dr. Papandrea's Homepage:  https://jimpapandrea.wordpress.com/
Theme Music: Gaudeamus (Introit for the Feast of All Saints), sung by Jeff Ostrowski. Courtesy of Corpus Christi Watershed:  https://www.ccwatershed.org/

St. Thérèse of Lisieux (1873 - 1897) is the youngest Doctor of the Church, but wrote more than some of the other Doctors. She has been called a doctor for the new millennium, and offers a striking contrast from our culture's obsession with being rich and famous, by giving us an example of holiness as seeking to be poor and anonymous.
Links
The writings of St. Thérèse of Lisieux (The Institute of Carmelite Studies) - https://www.icspublications.org/search?type=product&q=Lisieux
The Story of a Soul - From St. Thérèse's Original Notes - https://ascensionpress.com/products/story-of-a-soul-the-autobiography-of-st-therese-of-lisieux-catholic-classics

OR: https://www.icspublications.org/products/story-of-a-soul-the-autobiography-of-st-therese-of-lisieux
Her Last Conversations - https://www.icspublications.org/products/st-therese-of-lisieux-her-last-conversations
Pope St. John Paul II, Apostolic Letter The Science of Divine Love (1997) - https://www.vatican.va/content/john-paul-ii/en/apost_letters/1997/documents/hf_jp-ii_apl_19101997_divini-amoris.html
SIGN UP for Catholic Culture's Newsletter:  https://www.catholicculture.org/newsletters/
DONATE at:  http://www.catholicculture.org/donate/audio
Dr. Papandrea's Homepage:  https://jimpapandrea.wordpress.com/
Dr. Papandrea's latest book - Praying the Wisdom: Inspired Prayers for Lectio Divina and Contemplative Prayer: https://sophiainstitute.com/product/praying-the-wisdom/
Dr. Papandrea's YouTube channel, The Original Church: https://www.youtube.com/@TheOriginalChurch
Theme Music: Gaudeamus (Introit for the Feast of All Saints), sung by Jeff Ostrowski. Courtesy of Corpus Christi Watershed:  https://www.ccwatershed.org/

Called "The Little Flower," and "St. Thérèse of the Child Jesus," St. Thérèse of Lisieux (1873 - 1897) is our most recent doctor of the Church. She only lived to be 24 years old, but in her short life she became an example of humble service and redemptive suffering. 
 
Links
 
The writings of St. Thérèse of Lisieux (The Institute of Carmelite Studies) - https://www.icspublications.org/search?type=product&q=Lisieux
 
The Story of a Soul - From St. Thérèse's Original Notes - https://ascensionpress.com/products/story-of-a-soul-the-autobiography-of-st-therese-of-lisieux-catholic-classics
 
OR: https://www.icspublications.org/products/story-of-a-soul-the-autobiography-of-st-therese-of-lisieux
 
Her Last Conversations - https://www.icspublications.org/products/st-therese-of-lisieux-her-last-conversations
 
Pope St. John Paul II, Apostolic Letter The Science of Divine Love (1997) - https://www.vatican.va/content/john-paul-ii/en/apost_letters/1997/documents/hf_jp-ii_apl_19101997_divini-amoris.html
 
SIGN UP for Catholic Culture's Newsletter:  https://www.catholicculture.org/newsletters/
 
DONATE at:  http://www.catholicculture.org/donate/audio
 
Dr. Papandrea's Homepage:  https://jimpapandrea.wordpress.com/
 
Dr. Papandrea's latest book - Praying the Wisdom: Inspired Prayers for Lectio Divina and Contemplative Prayer: https://sophiainstitute.com/product/praying-the-wisdom/
 
Dr. Papandrea's YouTube channel, The Original Church: https://www.youtube.com/@TheOriginalChurch
 
Theme Music: Gaudeamus (Introit for the Feast of All Saints), sung by Jeff Ostrowski. Courtesy of Corpus Christi Watershed:  https://www.ccwatershed.org/

St. Alphonsus Liguori (1696 - 1787) is one of the most popular and widely-read spiritual writers of all time, and yet his most significant contribution to the Church was his moral theology, including the guidance he gave to clergy for hearing confessions.
Links
AUDIO BOOK - Liguori's Uniformity With God's Will - https://www.catholicculture.org/commentary/st-alphonsus-liguori-uniformity-with-gods-will/?repos=6&subrepos=0&searchid=2680738
Classics of Western Spirituality, Alphonsus Liguori: Selected Writings - https://www.paulistpress.com/Products/3771-2/alphonsus-de-liguori.aspx
Liguori's Duetto - https://www.youtube.com/watch?v=CYyHfHbHRxc
Pope St. John Paul II Apostolic Letter Spiritus Domini on St. Alphonsus Liguori (1987) - https://www.ewtn.com/catholicism/library/spiritus-domini-8413
SIGN UP for Catholic Culture's Newsletter:  https://www.catholicculture.org/newsletters/
DONATE at:  http://www.catholicculture.org/donate/audio
Dr. Papandrea's Homepage:  https://jimpapandrea.wordpress.com/
Dr. Papandrea's latest book - Praying the Wisdom: Inspired Prayers for Lectio Divina and Contemplative Prayer: https://sophiainstitute.com/product/praying-the-wisdom/
Dr. Papandrea's YouTube channel, The Original Church: https://www.youtube.com/@TheOriginalChurch
Theme Music: Gaudeamus (Introit for the Feast of All Saints), sung by Jeff Ostrowski. Courtesy of Corpus Christi Watershed:  https://www.ccwatershed.org/

St. Alphonsus Liguori (1696 - 1787) was a priest, bishop, spiritual director, retreat leader, musician and composer. Co-founder of the Redemptorists, he was a teacher of prayer, and a very popular confessor, who knew how to bring people to repentance.
Links
Liguori's Duetto - https://www.youtube.com/watch?v=CYyHfHbHRxc
Pope St. John Paul II Apostolic Letter Spiritus Domini on St. Alphonsus Liguori (1987) - https://www.ewtn.com/catholicism/library/spiritus-domini-8413
SIGN UP for Catholic Culture's Newsletter:  https://www.catholicculture.org/newsletters/
DONATE at:  http://www.catholicculture.org/donate/audio
Dr. Papandrea's Homepage:  https://jimpapandrea.wordpress.com/
Dr. Papandrea's latest book - Praying the Wisdom: Inspired Prayers for Lectio Divina and Contemplative Prayer: https://sophiainstitute.com/product/praying-the-wisdom/
Dr. Papandrea's YouTube channel, The Original Church: https://www.youtube.com/@TheOriginalChurch
Theme Music: Gaudeamus (Introit for the Feast of All Saints), sung by Jeff Ostrowski. Courtesy of Corpus Christi Watershed:  https://www.ccwatershed.org/