"19. The root reason for human dignity lies in man’s call to communion with God...The word atheism is applied to phenomena which are quite distinct from one another. For while God is expressly denied by some, others believe that man can assert absolutely nothing about Him. Still others use such a method to scrutinize the question of God as to make it seem devoid of meaning. Many, unduly transgressing the limits of the positive sciences, contend that everything can be explained by this kind of scientific reasoning alone, or by contrast, they altogether disallow that there is any absolute truth...Undeniably, those who willfully shut out God from their hearts and try to dodge religious questions are not following the dictates of their consciences, and hence are not free of blame; yet believers themselves frequently bear some responsibility for this situation. For, taken as a whole, atheism is not a spontaneous development but stems from a variety of causes, including a critical reaction against religious beliefs, and in some places against the Christian religion in particular. Hence believers can have more than a little to do with the birth of atheism. To the extent that they neglect their own training in the faith, or teach erroneous doctrine, or are deficient in their religious, moral or social life, they must be said to conceal rather than reveal the authentic face of God and religion."