After completing the final version of his general theory of relativity in November 1915, Albert Einstein wrote a book about relativity for a popular audience.
The seven lectures presented here were delivered in New York for the purpose of presenting the testimony of science as to the relation of matter and of consciousness; to enable the hearers to observe the identical manifestation of these relations and of certain basic laws in successively higher states of being, and thus to bring to them a realization of the universality of the evolutionary process and its actuality; and to deal somewhat with the nature of the expanded states of consciousness and the enlarged life toward which all mankind is traveling.
The Philosophy of Mystery by Walter Cooper Dendy is a philosophical exploration of the concept of mystery and humanity's enduring fascination with the unknown.