The One who is Contentment or Satisfaction.
As Tustih, Maa embodies contentment, fulfillment, and a state of deep inner peace that transcends material desires and all actions.
All efforts and their fruits can provide happiness and a succeeding boost to ego in subtler ways. It is only satisfaction that can lead one to seek something that could lie beyond satisfaction.
A satisfied Sadhak is prepared to walk the path of liberation.
Maa is that state of inner tranquillity and wholeness, where all efforts end.
Hence the name Tustih.