We must distinguish between speaking to deceive and being silent to be reserved.

If you want to kill Christianity you must abolish Sunday.

You will notice that in all disputes between Christians since the birth of the Church, Rome has always favored the doctrine which most completely subjugated the human mind and annihilated reason.

I know many books which have bored their readers, but I know of none which has done real evil.

Every one should be his own physician. We ought to assist, and not to force nature. Eat with moderation...Nothing is good for the body but what we can digest. What medicine can procure digestion? Exercise. What will recruit strength? Sleep.

If there are atheists, who is to be blamed if not the mercenary tyrants of souls who, in revolting us against their swindles, compel some feeble spirits to deny the God whom these monsters dishonour?

The man who says to me, "Believe as I do, or God will damn you," will presently say, "Believe as I do, or I shall assassinate you."