Stage 1. Core-self (atma) vs intellect + Kundalini

After Kundalini yoga, when Kundalini is disabled or suspended temporarily,

Stage 2. Core-self vs intellect

This is where the real battle begins...

After buddhi or Kriya yoga, core-self hiding in naad absorption and chit akash opens for few seconds, minutes or hours, you are lucky.

Stage 3. Core-self triumphs.

Once you are back to this mundane existence, all problems comes back into full force. 

So, every day we start from this stage 1 to stage 3, shortly go back to stage 3 to stage 1.