Bhagavad Gita Chapter 13, Verse 35

यच्चापि भूतानां भूतं पृथगात्मानं च ये विदुः | यान्ति ते परमां गतिमिति मे मतिर्निश्चिता ||

yac cāpi bhūtānāṁ bhūtaṁ pṛthag-ātmanāṁ ca ye viduḥ yānti te paramāṁ gatim iti me matir niścitā

Those who know the being (source) of all beings and the separate individual selves, and understand their distinction, attain the supreme goal. This is My certain opinion.

Krishna concludes Chapter 13 with certainty. 'Yac cāpi bhūtānāṁ bhūtaṁ pṛthag-ātmanāṁ ca ye viduḥ'—those who know the being (source) of all beings and the separate individual selves. Understanding the source of all beings (the Supreme) and the individual selves (the knowers), and understanding their distinction. 'Yānti te paramāṁ gatim'—they attain the supreme goal. When you understand both the source and the individual, and see the distinction between them, you attain liberation. 'Iti me matir niścitā'—this is My certain opinion. Krishna speaks with certainty—this is not speculation, not theory, but certain truth. Understanding the distinction between field and knower leads to the supreme goal. This is the final teaching of Chapter 13: know the source, know the individual, know the distinction, attain the supreme.