The first source, an excerpt from the preface to the second edition of Le Mystère des Cathédrales by Fulcanelli, focuses on the importance of the "phonetic cabala" as a lost language that can unlock the secrets of religious buildings. It distinguishes this concept from the Jewish Kabbalah, emphasizing the former's connection to nature and its role in the "Gay Science," the Language of the Gods. The second source, an introduction by Walter Lang, argues that alchemy is not merely a pseudoscience but a real science of energy transformation, citing examples from both ancient and modern times. It suggests that humanity's evolution, including its creation, is a result of alchemical processes conducted by "higher intelligences," and that such knowledge was deliberately encoded in ancient texts and structures, such as the Gothic cathedrals, waiting to be deciphered by those worthy of the task.