The sAdhana chatuShTaya is described by Shankara in the vivekachUDAmaNi as follows: Adau nityAnityavastuvivekaH parigaNyate |ihAmutraphalabhOgavirAgasttadanantaram ||shamAdiShaTkasampattiH mumukShutvamiti sphuTam || – Verse 19. 1. Vivekadiscrimination of Real from unreal.Bhagawat Gita explains this in the 3th Chapter Skhetra-Skhetragnya Yoga. This is the first chapter in the third part of Gita i.e. Gnana Kand or Jnana Yoga…