Mahabharata 12.296.7

12.296.7

pañcaviṃśaṃ mahātmānaṃ na cāsāvapi budhyate |
ṣaḍviṃśaṃ vimalaṃ buddhamaprameyaṃ sanātanam || 7 ||

In consequence of this (viz., his attachment to or union with Prakriti), Jiva or Purusha, who is not manifest and which in his real nature is not subject to modifications, comes to be called as the Unawakened or Ignorant. Indeed because the twenty-fifth can comprehend the Unmanifest, he is therefore, called Budhyamana (or Comprehender). He cannot, however, readily comprehend the twenty-sixth, which is stainless, which is Knowledge without duality, which is immeasurable, and which is eternal. The twenty-sixth, however, can know both Jiva and Prakriti, numbering the twenty-fifth and the twenty-fourth respectively. O thou of great effulgence, only men of wisdom succeed in knowing that Brahma which is Unmanifest, which inheres in its real nature to all that is seen and unseen, and which, O son is the one independent essence in the universe. When Jiva considers himself different from what he truly is (i.e. when he regards himself as fat or lean, fair or dark a Brahmana or a Sudra), it is only then that he fails to know the Supreme Soul and himself and Prakriti with which he is united. When Jiva succeeds in understanding Prakriti (and knowing that she is something different from him) then he is said to be restored to his true nature and then does he attain to that high understanding which is pure and stainless and which is concerned with Brahma.