Upanishads are the ancient Indian texts believed to be dating back to at least 5000 years. They are parts of the Vedas. They formed the main philosophic texts of Ancient India, at least before the advent of Buddhism.

Some of the thoughts expressed in these Upanishads are amazing, seen even from today’s point of view. My intention is not to say that whatever expressed in them is right. I just want to highlight how wrong we are when we try to assign a chronology to intellectual evolution.