"The meditative techniques practiced by alchemists in the Middle Ages were different from what we think of as meditation today. Alchemical meditation was an active instead of a passive activity, and it focused on harnessing spiritual forces for positive transformation and specific manifestations. This discussion with Dennis William Hauck reviews actual meditations practiced by medieval and Renaissance alchemists and their applications to the modern spiritual practitioner." https://www.youtube.com/watch?v=DWdN1aCxcKw&feature=youtu.be