Text 51-53

बुद्ध्या विशुद्ध्या युक्तो धृत्यात्मानं नियम्य च ।
शब्दादीन्विषयांस्त्यक्त्वा रागद्वेषौ व्युदस्य च ॥५१॥
विविक्तसेवी लघ्वाशी यतवाक्कायमानसः ।
ध्यानयोगपरो नित्यं वैराग्यं समुपाश्रितः ॥५२॥
अहंकारं बलं दर्पं कामं क्रोधं परिग्रहम् ।
विमुच्य निर्ममः शान्तो ब्रह्मभूयाय कल्पते ॥५३॥

buddhyā viśuddhayā yukto
dhṛtyātmānaḿ niyamya ca
śabdādīn viṣayāḿs tyaktvā
rāga-dveṣau vyudasya ca
vivikta-sevī laghv-āśī
yata-vāk-kāya-mānasaḥ
dhyāna-yoga-paro nityaḿ
vairāgyaḿ samupāśritaḥ
ahańkāraḿ balaḿ darpaḿ
kāmaḿ krodhaḿ parigraham
vimucya nirmamaḥ śānto
brahma-bhūyāya kalpate

Translation:

Being purified by his intelligence and controlling the mind with determination, giving up the objects of sense gratification, being freed from attachment and hatred, one who lives in a secluded place, who eats little, who controls his body, mind and power of speech, who is always in trance and who is detached, free from false ego, false strength, false pride, lust, anger, and acceptance of material things, free from false proprietorship, and peaceful -- such a person is certainly elevated to the position of self-realization.

Purport:

When one is purified by intelligence, he keeps himself in the mode of goodness. Thus one becomes the controller of the mind and is always in trance. He is not attached to the objects of sense gratification, and he is free from attachment and hatred in his activities. Such a detached person naturally prefers to live in a secluded place, he does not eat more than what he requires, and he controls the activities of his body and mind. He has no false ego because he does not accept the body as himself. Nor has he a desire to make the body fat and strong by accepting so many material things. Because he has no bodily concept of life, he is not falsely proud. He is satisfied with everything that is offered to him by the grace of the Lord, and he is never angry in the absence of sense gratification. Nor does he endeavor to acquire sense objects. Thus when he is completely free from false ego, he becomes nonattached to all material things, and that is the stage of self-realization of Brahman. That stage is called the brahma-bhuta stage. When one is free from the material conception of life, he becomes peaceful and cannot be agitated. This is described in Bhagavad-gita (2.70):

apuryamanam acala-pratishtham

samudram apah pravisanti yadvat

tadvat kama yam pravisanti sarve

sa santim apnoti na kama-kami

"A person who is not disturbed by the incessant flow of desires -- that enter like rivers into the ocean, which is ever being filled but is always still -- can alone achieve peace, and not the man who strives to satisfy such desires."