If one has the capacity to make progress and to tune in to the True Divinity, he must--if he is to continue and not become sidetracked--renounce all interest in mediumistic or other so-called spiritualistic practices. Such an individual should strive to better his own character, cultivate his intuition, and increase his knowledge about the higher laws by studying inspired and reliable books.

-- Notebooks Category 2: Overview of Practicies Involved > Chapter 9: Conclusion > # 35