"Are not laws dangerous which inhibit the passions? Compare the centuries of anarchy with those of the strongest legalism in any country you like and you will see that it is only when the laws are silent that the greatest actions appear"

The Marquis de Sade is suggesting that laws can be hazardous if they hinder the enthusiasms of people. He is recommending that when laws are too restrictive, it can lead to an absence of action and creativity. He is comparing centuries of anarchy with those of the greatest legalism in any nation and suggesting that it is just when laws are quiet that the greatest actions appear. He is implying that when laws are too limiting, it can result in a lack of progress and imagination. He is suggesting that laws must remain in place to safeguard individuals, however should not be so restrictive that they hinder people's passions and imagination. He is recommending that a balance should be struck in between laws and freedom, so that people can still be innovative and act.