Quos Deus vult perdere, prius dementa
From Gaudet Mater Ecclesia, the opening address of Pope John XXIII at the beginning of Vatican II on October 11, 1962:
The opportuneness of holding the Council is, moreover, venerable brothers, another subject which it is useful to propose for your consideration. Namely, in order to render our Joy more complete, we wish to narrate before this great assembly our assessment of the happy circumstances under which the Ecumenical Council commences.
In the daily exercise of our pastoral office, we sometimes have to listen, much to our regret, to voices of persons who, though burning with zeal, are not endowed with too much sense of discretion or measure. In these modern times they can see nothing but prevarication and ruin. They say that our era, in comparison with past eras, is getting worse, and they behave as though they had learned nothing from history, which is, none the less, the teacher of life. They behave as though at the time of former Councils everything was a full triumph for the Christian idea and life and for proper religious liberty.
We feel we must disagree with those prophets of gloom, who are always forecasting disaster, as though the end of the world were at hand.
In the present order of things, Divine Providence is leading us to a new order of human relations which, by men’s own efforts and even beyond their very expectations, are directed toward the fulfilment of God’s superior and inscrutable designs. And everything, even human differences, leads to the greater good of the Church.
Go here to read the rest. The Church probably would have been in for a rough patch over the last half century even without Vatican II. However, Vatican II turned a rough patch into a three ring disaster, complete with evil clowns in positions of authority.