There is danger lest it should one of these days render man's terrestrial abode so blessed, that he may conceive an antipathy to Heaven.

The Church, having the mission to conduct us to that eternal felicity which is the sole end of human existence, is bound to discourage our dealings with science.

The utmost she can venture to do is to let a select number of her most trustworthy servants have free access to it, in order that the enemies of the faith may find somebody whom they can speak to.
This is why I undertake to show you in Rome a dozen men of high literary and scientific acquirements, to a hundred thousand who don't know their ABC.
The Church is but the more flourishing for it, and the State by no means the less so.

The true shepherds of peoples, they who feed the sheep for the sake of selling the wool and the skins, do not want them to know too much.

The mere fact of a man's being able to read makes him wish to meddle with everything.