How true this is, the necessity of the case itself teaches. For if it is virtue to resist with fortitude evils and vices, it is evident that, without evil and vice, there is no perfected virtue; and that God might render this complete and perfect, He retained that which was contrary to it, with which it might contend. For, being agitated by evils which harass it, it gains stability; and in proportion to the frequency with which it is urged onward, is the firmness with which it is strengthened. This is evidently the cause which effects that, although justice is sent to men, yet it cannot be said that a golden age exists; because God has not taken away evil, that He might retain that diversity which alone preserves the mystery of a divine religion.