You might look into Krishnamurti, who's teaching was often compared favorably to the Upanishads. I spent many years reading and trying to understand what he was "really" saying. Before he died in 1986 he had many discussions with the physicist David Bohm, who in many ways further illuminated what K was teaching from his background in physics. I attended some of K's teachings the year before he died. He was an extremely rare soul.
Most of these discussions can be found online, in videos and audios, plus there are many books on K and Bohm, with several others who took a keen interest in K's teachings. The Upanishads are so ancient (c. 800-300 BCE) and authorless (nobody knows who originally wrote them), that it can be helpful if the language is modernized, which K and Bohm provide, along with the others who participated in many discussions.
You might look into Krishnamurti, who's teaching was often compared favorably to the Upanishads. I spent many years reading and trying to understand what he was "really" saying. Before he died in 1986 he had many discussions with the physicist David Bohm, who in many ways further illuminated what K was teaching from his background in physics. I attended some of K's teachings the year before he died. He was an extremely rare soul.
Most of these discussions can be found online, in videos and audios, plus there are many books on K and Bohm, with several others who took a keen interest in K's teachings. The Upanishads are so ancient (c. 800-300 BCE) and authorless (nobody knows who originally wrote them), that it can be helpful if the language is modernized, which K and Bohm provide, along with the others who participated in many discussions.