Shwe Oo Min Dhammasukha Tawya 2019 Vassa Q&A 20190717
When the mind is stronger, it can be aware of more subtle objects, or choose to be aware of the subtle objects.
Your mind already knows how to be aware of obvious objects. Between the obvious and the subtle object, choose and stay with the subtle object.
When the awareness becomes stronger, the subtle objects become obvious.