It is a case of taking something away.
This “something” which must be taken away is precisely what you consider to be “you”.
It is a case of mistaken identity.
Who you really are is already enlightened. What you have to “attain” is identifying with your true Self.
It is like a light which illuminates the inside of a box. The light can’t see itself, all it sees is a box, so thinks it is the box!
You are the light. Identify with the light. Be the light.