Dear Jenni:

I have noticed that there are all kinds of theories about where this quote originated, from this or that speech of Pope Paul VI. But, the apparent authoritative source is Cardinal Ratzinger (now Pope Benedict XVI).

In the book, The Ratzinger Report, the Cardinal was interviewed by Vittorio Messori concerning the state of the Church. Chapter 10 discusses the Cardinal's thoughts about Satan. The Cardinal said:

On November 15, 1972, Pope Paul VI delivered his often quoted speech regarding Satan. At the time he stated: "I have the feeling that the smoke of Satan has penetrated the Temple of God." He went on to say: "I believe in something supernatural that has come into the world to destroy and strangle the very fruits of he Ecumenical Council and to stop the Church from breaking out into a hymn of joy, by sowing doubt, uncertainty, problems, unrest, and discontent."

He went on to say that "the evil which exists in the world is the result and effect of an attack upon us and our society by a dark and hostile agent, the devil."... He finished up by stating: "The devil is the enemy number one, the source of all temptation. Thus we know that this dark and destructive being really exists and is still active."

Pope Paul VI was certainly a prophet. Just in one sector, this "sowing doubt, uncertainly, problems, unrest, and discontent" as been realized in spades caused by the Ultra-Traditionalists (who disparage Vatican II) and the Liberals (who abuse Vatican II). These two camps are merely two sides of the same disobedient coin. Both of these camps think they know more than the Holy See and sow the doubt and discontent that our Holy Father predicted.

The smoke of Satan has certainly entered the Church through the Liberals and through the Ultra-Traditionalists.

Though the number one source of smoke is probably plausibility (political correctness). You can read in detail about Satan secret strategies of plausibility in the essay, Three Secret Strategies of Satan.

God Bless,
Bro. Ignatius Mary