The purpose of all spiritual teachings and practices is to remove ignorance and the vasanas (egoic habitual tendencies), and so end suffering.
There is nothing to gain. No special knowledge or experience. You are already That. Just lose the ignorance.
In truth spiritual practices and teachings are more illusion. There is no teacher, there is no teaching, there is no taught. Ignorance itself is more illusion. There is no real ignorance.
However as a belief that ‘I am a body mind’ has arisen, the teacher and teaching appear to also arise. This is known as ignorance.
This is because you take yourself to be limited. You take yourself to be a body mind.
Do not take yourself to be the body-mind!
You are That!
You are That Eternal Nothingness!