In his book, Frère Michel reports that, when questioned about the Secret, Sister Lucy said: "It’s in the Gospel and in the Apocalypse, read them!" He notes that she then particularly indicated Chapters VIII through XIII of the Apocalypse (Chapter XIII specifically concerns the rise of the Antichrist). In his study of the Third Secret, Frère Michel builds a powerful and compelling case that the Third Secret is a grave warning of apostasy within the Catholic Faith and a serious indictment of those in the Church hierarchy who have promoted dissent and outright heresy.
Although Sister Lucy is not permitted to reveal the final Secret of Our Lady until the Holy Father himself deems the moment opportune, nothing has prevented her from giving her opinion on the crisis in the Church as an individual person. In a series of letters written between 1969 and 1972, Sister Lucy reacted vigorously against modernists and others in the Church, in particular those who seek to minimize the importance of the Rosary. "This disorientation is diabolical," she wrote, and "it is sad that so many people let themselves be dominated by the diabolical wave sweeping over the world! And they are blinded to the point where they are incapable of seeing error! Their principal fault is that they have abandoned prayer." The saddest part of all, according to Sister Lucy, is that so many priests, religious and bishops are swept away in the confusion. "The devil has succeeded in bringing in evil (to the Church) under the guise of good and the blind are beginning to lead others, as the Lord tells us in His Gospel."
In the conclusion to his study of the Third Secret, Frère Michel sums up his findings as follows:
"Having reached the end of our inquiry, we are able to discern, with near certainty, the essential elements of Our Lady’s final secret: While ‘in Portugal, the dogma of the Faith will always be preserved,’ in many nations, perhaps in almost the entire world, the Faith will be lost. The pastors of the Church will fail gravely in the duties of their office. Through their fault, consecrated souls and the Faithful in great number will let themselves be seduced by pernicious errors spread everywhere. This will be the time of the decisive battle between the Blessed Virgin and the devil. A wave of diabolical disorientation will be hurled over the world. Satan will introduce himself even to the highest summit of the Church. He will blind the minds and harden the hearts of pastors. And God will deliver them to themselves as a chastisement for their refusal to obey the requests of the Immaculate Heart of Mary. This will be the great apostasy predicted for the ‘last times’; ‘the False Lamb’ and ‘False Prophet’ will betray the Church to the profit of ‘the Beast,’ according to the prophecy of the Apocalypse."
... We must defend souls against the errors which can make them stray from the good road. ... We cannot and we must not stop ourselves, nor allow, as Our Lord says, the children of Darkness to be wiser than the children of Light ... The Rosary is the most powerful weapon for defending ourselves on the field of battle.