"Nature, who for the perfect maintenance of the laws of her general equilibrium, has sometimes need of vices and sometimes of virtues, inspires now this impulse, now that one, in accordance with what she requires"

This quote by Marquis de Sade speaks to the idea that nature is in a constant state of balance, and that in order to maintain this balance, it requires both vices and virtues. Nature is seen as a force that is able to inspire different impulses in order to achieve its desired equilibrium. This suggests that nature is in control of the balance between good and bad, and that it is able to manipulate the actions of people in order to achieve its desired outcome. This quote implies that nature is a powerful force that is able to influence the behavior of people in order to maintain its balance. It also suggests that nature is able to use both vices and virtues to achieve its desired outcome, and that it is ultimately in control of the balance between good and bad.