Just to clarify "don't know" mind:
The perfection of the Four Noble Truths, the Eightfold Path, the precepts, ad nauseum is prajnaparamita or "emptiness". "Don't know" mind is emptiness, resting in the absence of all beliefs, projections into the future, or stories of the past, and "self". It is the Tao, primordial being-ness. It does not rely on any practice methodology, religion, belief-system, philosophy or any kind of "doing" by a "self". This "being-ness" is how things actually are. It is simplicity itself.
When the mind is still, look for any of these qualities and see that they only arise with the thinking mind as concepts. This is where our struggle with reality begins.