B.G 7.05

अपरेयमितस्त्वन्यां प्रकृतिं विद्धि मे पराम्। जीवभूतां महाबाहो ययेदं धार्यते जगत् ॥५॥

apareyamitastvanyāṁ prakr̥tiṁ viddhi me parām। jīvabhūtāṁ mahābāho yayedaṁ dhāryate jagat ॥5॥

This (material nature) is inferior; but know that there is another, higher 'Prakrti' of Mine, O mighty-armed one, which constitutes the life force and by which this universe is sustained.

Gīta Bhāshya 7.05

The differentiation between Chit-Prakrti (conscious principle) and Achit-Prakrti (inert principle), the two different aspects of 'mahat' principle is brought out by substantiating the point made through a quote from Naradiya Purana.

The word 'aparā', i.e. inferior, means not the highest compared to what is going to be described further. The Goddess Shri is the sustainer of living beings, constituting the life force of all beings, is of the nature of consciousness, always existing and real.

"This, (i.e. Mahat or Prakrti) is the greatest (mahat) of all conscious beings."

-stated thus in the Vedic testimonial.

And, regarding Her, it is said:

"The nature of 'Prakrti' i.e. goddess Shri that belongs to the Lord, is indeed of two types, inert and non-inert (conscious). The unmanifest upon manifestation of the inert nature is again divided into eightfold through creation. They are indeed the great mahat, the intellect, mind, and the five elements. This inert nature is inferior ('aparā') in comparison to the superior goddess Shri and is sustained by her. She, however, is of the nature of consciousness, infinite, without beginning or end, and far superior. Nothing is as dear to the great soul lord Vishnu in comparison to her. She is the consort of Narayana and even the mother of Brahma. By these two (inert and non-inert prakrti, i.e. Shri), Lord Hari (Vishnu), the ruler of beings, creates the entire universe."

- stated thus in the Naradiya (Purana).