On the Demonic

Archbishop Fulton J. Sheen

Compiled and Edited by Fr. Dave Tomaszycki

"The reason the Son of God appeared was to destroy the works of the devil"

In 1974, Archbishop Fulton J. Sheen stated that he intended to write a book about the demonic. But such a book never came to fruition. Now, some fifty years later, Sheen’s intended book has finally been compiled, all in his own words.

Archbishop Futlon Sheen

About Fulton J. Sheen

Fulton Sheen

Perhaps the best-known cleric of his day, Archbishop Fulton J. Sheen hosted his Emmy-winning television show from 1951–1966 and authored dozens of books and countless newspaper articles and columns. On the Demonic is only the second of his books to be published posthumously. Sheen’s cause for canonization was opened in 2002.


Fr. Dave Tomaszycki currently serves as Priest Secretary to the Archbishop of Detroit.

This book should be in every Catholic household.

In On the Demonic, Sheen addresses the history of the demonic, how the devil manifested himself to Our Lord, how he has worked throughout the Church’s history, and how the Anti-Christ will come in the end times.


Though Sheen is not optimistic about world history, he is most optimistic about Jesus’ final victory: “There is one thing we do know. If Christ wins, we win!“

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An excerpt from On the Demonic

Praise for On the Demonic


“Fr. Tomaszycki has done us a great favor by compiling in On the Demonic Archbishop Fulton Sheen’s wisdom about the nature of the Evil One, the signs of his activity, and our defenses against his wiles. In his lifetime, the Venerable Servant of God Fulton Sheen was renowned as an evangelist. Through this book he again offers us Good News—given what’s at stake, the best news—about the victory of Jesus Christ over ‘principalities and powers’ and how to make his triumph our own.”

- Archbishop Allen Vigneron,
Archbishop of the Archdiocese of Detroit
peter howard

"This book could not be more needed. In his customary clarity and deep insights, Archbishop Fulton Sheen unmasks the demonic and its tactics that are ruining souls and ripping apart marriages, families, and the world itself. Moreover, Fulton Sheen reveals three powerful weapons to send the demons back to hell. This book should be in every Catholic household.”


-Peter Howard
Founder of the Fulton Sheen Institute and the Fulton Sheen Movement

"As Fulton Sheen repeated over and over, we need not fear the devil, for Jesus is the stronger One and has defeated him out of love for us. This book is a treasure. It’s not only a compendium of everything Sheen wrote or said on the enemy of the human race, it is an immensely practical guide for warding him off in our own daily lives.”


-Fr. John Riccardo
Missionary and Executive Director of Acts XXIX

"Christ has secured our final victory, but Archbishop Sheen has helped us understand the war plan."


Al Kresta, Host of Kresta in the Afternoon