A guru is a must
If you read scriptures, you formulate a thought. The thinking has a basis on the material world. Or based on some super natural fantasy
I don’t challenge anyone. Let them continue in their way. Even if a guru tries, their ego and the ego that they understood correctly prevents them from accepting a more clear beautiful addicting experience
Surrender to guru has many reasons. Decreasing the ego, eliminating the false understanding, ( a few more )
When all these are eliminated, then true swarodaya arises. Swar in reality is not the breath
Tantra refers to Swar as something else. In depth description of Swar is found in some books out of print
Bhavin