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Heresy is another word for freedom of thought.

In the end it is worse to suppress dissent than to run the risk of heresy.

Scientific prayer makes God a celestial lab rat, leading to bad science and worse religion.

Skepticism is the sadism of embittered souls.

If we did not have rational souls, we would not be able to believe.

There is no heresy or no philosophy which is so abhorrent to the church as a human being.

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.

While it may be disappointing, I have to confess to people who ask for my insights on the meaning of it all that astronomy doesn't provide any clearly useful data on matters of sin and souls.

The scientific spirit is of more value than its products, and irrationally held truths may be more harmful than reasoned errors.

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.