Rudolf Steiner 
The Way of Initiation or, How to Attain Knowledge of the Higher Worlds [EPUB ebook] 

Rudolf Steiner was a philosopher, social thinker, architect, and esotericist. His philosophical work, which he termed spiritual science, sought to provide a connection between the cognitive path of Western philosophy and the inner and spiritual needs of the human being. In 
The Way of Initiation, Steiner details the exercises and moral qualities to be cultivated on the path to a conscious experience of ‘supersensible’ realities. His short but powerful book is intended as a guide for achieving spiritual vision.