Eight principles have been called by the name of Nature, while sixteen have been called changes. Of Manifest, there are seven. These are of views of those persons who are conversant with the spiritual science.
अष्टौ प्रकृतयः प्रोक्ता विकाराश्चापि षोडश। तत्र तु प्रकृतीरष्टौ प्राहुरध्यात्मचिन्तकाः॥