B.G 5.25
लभन्ते ब्रह्मनिर्वाणमृषयः क्षीणकल्मषाः। छिन्नद्वैधाऽयतात्मानः सर्वभूतहिते रताः ॥२५॥
labhante brahmanirvāṇamr̥ṣayaḥ kṣīṇakalmaṣāḥ। chinnadvaidhā''yatātmānaḥ sarvabhūtahite ratāḥ ॥25॥
That seer, whose defects have been destroyed, attains liberation in Brahman. Upon becoming free from doubts, his mind establishes itself in profound intelligence and he engages himself in the welfare of all beings.
Gīta Bhāshya 5.25
'chinnadvaidhā' - one who is without doubts and misconceptions. 'ayatātmānaḥ' - means one who has profound intellect; it results from the removal of doubts.
By the destruction of defective impressions, the resulting benefits are stated by 'labhante', i.e. 'obtains', verse.
Those whose impurities have diminished become 'chinnadvaidhā' and 'ayatātmānaḥ'. It means absence of doubt. The word 'dvaidha' means doubt, and it also means misconception. Thus, it is said:
"The misconception and doubt is called 'dvaidha', that arises among those with impure intellect. It should be cutoff with the help of knowledge to become free from attachment, and to attain the supreme Lord."
- stated thus.
Those whose doubt has been cut off can only become 'ayatātma', i.e. pocessing controlled minds. Thus 'chinnadvaidhāyatātmānaḥ' are those possessing profound intellect and who are all-knowing. Because they are all-knowing, they will be able to cut off any doubts. Hence, it is said:
"Having diminished defective imprints, knowledge of the 'mahat' (the great prakrti principle) arises, and doubts are dissolved."
- stated thus.
It can also be interpreted as 'having a controlled mind because of overcoming the doubt'.