https://github.com/davepinch/pinchy.cc/blob/master/content/topics/people/a/albert-einstein/opportunity/in-the-middle-of-difficulty-lies-opportunity.md
Except in unusual circumstances, it is probably not attainable except by those who have conditioned themselves through long application of meditation or by those who have practiced long and hard through use of the Hemi-Sync tapes for a period of months if not years.
