Mind is the energy that connects us to all the universe and to Source. It is at this level that quantum energetic shifts occur. 

However, where pop psychology claims that ego thinking impacts Mind .. this is wrong. 

It is based on the notion that Mind is a byproduct of brain function and it's not. 

We access Mind Wisdom and the infinite power of the unconditional love that we already are by dropping ego thinking NOT controlling it through reframing habitual thinking

So that's why positive affirmations are pointless.