The Philosophy Of Freedom by Rudolf Steiner
The Goal Of Knowledge
0.7 Practicing Pure Thinking
 At first the reader is lead into abstract regions, where thought must draw sharp outlines to reach clearly defined positions. But the reader is also led from arid concepts into concrete life. I am fully convinced that to experience life in all its aspects, one must soar into the realm of concepts. Whoever is limited to the pleasures of the senses misses the sweetest joys of life.
The oriental sage requires his disciples to live a life of resignation and asceticism for years before he shares with them his knowledge. The West no longer demands pious exercises and ascetic practices to attain knowledge. It does require, however, a sincere willingness to prepare for science by withdrawing oneself awhile from the immediate impressions of life, and entering the realm of pure thought.