If forgers and malefactors are put to death by the secular power, there is much more reason for excommunicating and even putting to death one convicted of heresy.

Most men seem to live according to sense rather than reason.

Nothing created has ever been able to fill the heart of man. God alone can fill it infinitely.

One aspect of neighbourly love is that we must not merely will our neighbours good, but actually work to bring it about.

Man cannot live without joy; therefore when he is deprived of true spiritual joys it is necessary that he become addicted to carnal pleasures.

Practical sciences proceed by building up; theoretical science by resolving into components.

The truth of our faith becomes a matter of ridicule among the infidels if any Catholic, not gifted with the necessary scientific learning, presents as dogma what scientific scrutiny shows to be false.