Formless and pervasive to form
Fire is all pervasive. It pervades stone but the pervading formless fire cannot heat a glass of water even if praised through all hymns, prayers, or mantras. This formless fire, when given form by striking a stone against another stone, is capable to burn.
Pervading butter in milk has no form. On the recommendation of an Ayurvedic doctor, if the patient drinks hot milk instead of the recommended ghee after being poisoned, he will sink in death. Formless butter in milk will not give the results of ghee.
There is formless milk in the breast of a female. It does not nourish them. When the same formless milk is given the form of milk and given to a baby, it does become nourishment.
The mind cannot remain fixed on/in the formless but for a very select few.