In Bhagavad Gita Chapter 4 Verse 34 Shri Krishna instructs Arjun to seek the refuge of a Tatvadarshi Sant for complete knowledge. As per Bhagavad Gita Chapter 15 Verse 1-4, a saint who can explain the inverted tree like world will be a Tatvadarshi Sant.
Sant Rampal Ji has given complete knowledge about creation of universe and explained the inverted tree of the world thoroughly. Sant Rampal Ji is the only Tatvadarshi Sant in this world at this point in time.