Henceforth it will be the task of this Sacred Congregation not only to examine carefully the books denounced to it, to prohibit them if necessary, and to grant permission for reading forbidden books, but also to supervise, ex officio, books that are being published, and to pass sentence on such as deserve to be prohibited.

True Christianity today is not different from primitive Christianity ... She remains what she has been since her foundation: always the same.

[A] high minded gallantry in defense of the foundations of Christian culture.

One Galileo in two thousand years is enough.

Nothing is lost by peace; everything may be lost by war.

Let no Christian therefore, whether philosopher or theologian, embrace eagerly and lightly whatever novelty happens to be thought up from day to day, but rather let him weigh it with painstaking care and a balanced judgment, lest he lose or corrupt the truth he already has, with grave danger and damage to his faith.

Let nothing novel be introduced!