45 When society is formed on a basis of rights and duties, men have an immediate grasp of spiritual and intellectual values, and have no difficulty in understanding what is meant by truth, justice, charity and freedom. They become, moreover, conscious of being members of such a society. And that is not all. Inspired by such principles, they attain to a better knowledge of the true God—a personal God transcending human nature. They recognize that their relationship with God forms the very foundation of their life—the interior life of the spirit, and the life which they live in the society of their fellows.
Source: Pacem in Terris (Vatican.va)