Bg. 18.51-53

बुद्ध्या विशुद्धया 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॥

Text

buddhyā viśuddhayā yukto
dhṛtyātmānaṁ niyamya ca
śabdādīn viṣayāṁs tyaktvā
rāga-dveṣau vyudasya ca

vivikta-sevī laghv-āśī
yata-vāk-kāya-mānasaḥ
dhyāna-yoga-paro nityaṁ
vairāgyaṁ samupāśritaḥ

ahaṅkāraṁ balaṁ darpaṁ
kāmaṁ krodhaṁ parigraham
vimucya nirmamaḥ śānto
brahma-bhūyāya kalpate

Synonyms

buddhyāplugin-autotooltip__small plugin-autotooltip_bigbuddhyā

and intelligence; by intelligence; by proper intelligence; by so-called intelligence or experimental knowledge; by the intelligence; intelligence; through reason; with intelligence; with the intelligence.
—by the intelligence; viśuddhayāplugin-autotooltip__small plugin-autotooltip_bigviśuddhayā

by purified; fully purified; sanctified.
—fully purified; yuktaḥplugin-autotooltip__small plugin-autotooltip_bigyuktah

accompanied; actual yogī; all engaged; associated with; being absorbed; being engaged; being united; bestowed; combined; competent for self-realization; devoutly attached; dovetailed; endowed; endowed with; engaged; engaged in the divine consciousness; fixed; in touch with the Supreme; in trance; is in the transcendental position; one who is engaged in devotional service; such engagement; surrounded; through such agency; together; well situated in yoga; with; with great attention.
—such engagement; dhṛtyāplugin-autotooltip__small plugin-autotooltip_bigdhṛtyā

by determination; by patience; determination.
—determination; ātmānamplugin-autotooltip__small plugin-autotooltip_bigatmanam

and of the mind; by His energies; living entities; mind; most dear; of all living entities; of all other souls; of all the living entities; of men; of such a mind; of the body; of the living entities; of the people; of the subtle body; of those whose minds; the mind; thus inclined; whose minds are absorbed.
—self; niyamyaplugin-autotooltip__small plugin-autotooltip_bigniyamya

by regulating; controlling; regulated; regulating.
—regulated; caplugin-autotooltip__small plugin-autotooltip_bigca

ca; all these; also; also other bodily forms; also that I have not been able to ask; and (the five gross material elements and the ten acting and knowledge-gathering senses); and; and also; and Devahūti; and for all; and the paraphernalia; as also; as much as; as well; as well as; but; certainly; either; however; indeed; only; or; over and above; respectively; the word ca; this word ca; thus; totally; unlimitedly; verily.
—also; śabdādīnplugin-autotooltip__small plugin-autotooltip_bigśabdādīn

the sense objects, such as sound, etc.
—the sense objects, such as sound, etc.; viṣayānplugin-autotooltip__small plugin-autotooltip_bigviṣayān

different states; kingdoms; material happiness; material paraphernalia; material sense objects; objects of sense gratification; objects of the senses; on sense objects; sense gratification; sense objects; such kingdoms; the objects of sense enjoyment.
—sense objects; tyaktvāplugin-autotooltip__small plugin-autotooltip_bigtyaktvā

giving up; having abandoned; having forsaken; having given up; leaving; leaving aside; relinquishing; renouncing; throwing away.
—giving up; rāgaplugin-autotooltip__small plugin-autotooltip_bigrāga

attachment; attachment for material things; attachments; attraction; love; of attachment; of love; spontaneous devotion; spontaneous love; whose luster.
—attachments; dveṣauplugin-autotooltip__small plugin-autotooltip_bigdveṣau

also in detachment; hatred.
—hatred; vyudasyaplugin-autotooltip__small plugin-autotooltip_bigvyudasya

giving up; giving up completely; having laid aside; one who has thrown aside.
—having laid aside; caplugin-autotooltip__small plugin-autotooltip_bigca

ca; all these; also; also other bodily forms; also that I have not been able to ask; and (the five gross material elements and the ten acting and knowledge-gathering senses); and; and also; and Devahūti; and for all; and the paraphernalia; as also; as much as; as well; as well as; but; certainly; either; however; indeed; only; or; over and above; respectively; the word ca; this word ca; thus; totally; unlimitedly; verily.
—also; viviktaplugin-autotooltip__small plugin-autotooltip_bigvivikta

completely pure; purified; secluded; solitary; understanding; Vivikta; without a doubt; without affection.
-sevīplugin-autotooltip__small plugin-autotooltip_bigsevi

I always worship Lord Nārāyaṇa.
—living in a secluded place; laghuplugin-autotooltip__small plugin-autotooltip_biglaghu

because of being very fine; lightness; the duration of time called a laghu; younger.
-āśīplugin-autotooltip__small plugin-autotooltip_bigasi

appear to be; are; are you; become; by swords; certainly You are so; do You belong; have been done; sword; swords; with swords; you are; you are considered; You can; you have become; You must be; you shall be; you were.
—eating a small quantity; yataplugin-autotooltip__small plugin-autotooltip_bigyata

all; ail; all (descendants); all; all kinds of; all of them; all others; all that; all the devotees who; all these; as; as many (as there are); as many; as many as; as many as there are; as many as there were; as much; as much as; controlled; controlling; so many; varieties of; various types of; whatever.
-vākplugin-autotooltip__small plugin-autotooltip_bigvāk

a sound vibration; a voice; an elegant manner of speaking; by words; in speaking; my words; Sarasvatī, the goddess of learning; speaking; speech; the faculty of speech; the organ of speech; the sense for speaking; the words; vibration; vocabulary; with sweet words; words.
—control of speech; kāyaplugin-autotooltip__small plugin-autotooltip_bigkaya

are described; are explained; describe; describes; discussed; has said; is called; is meant; is said; is spoken; it is said; mother Sarasvatī says; said; say; says; speaks; utters.
—body; mānasaḥplugin-autotooltip__small plugin-autotooltip_bigmanasah

by the mind; from the mind; more than the mind; of one whose mind; of the mind; of the subtle body; than the mind; the mind; the minds; their minds; those whose minds; whose minds; within their minds.
—control of the mind; dhyānaplugin-autotooltip__small plugin-autotooltip_bigdhyāna

by meditation; meditation; of meditation; positive meditation; the meditation.
-yogaplugin-autotooltip__small plugin-autotooltip_bigyoga

yoga practice; and mystic power; and of mystic yoga; and of the means; by bhakti-yoga, devotional service; by yoga; by yoga practice; by a conjunction; by devotional service; by mystic power; by mystic practice; by mysticism; by power of mystic yoga; by practice of yoga; by practice of devotion; by the process of linking with the Supreme by bhakti-yoga; concentration of the mind; connection; devotion; devotional service in karma-yoga; eightfold yoga; in the mystic yoga process; in the mystic yoga process; linking process; means; mystic haṭha-yoga; mystic yoga practices; mystic; mystic power; mystic powers; mystic yoga practice; mystic yogic meditation; of linking up; of mystic yoga; of mysticism; of the yoga system; of yogic perfections; practice of the mystic yoga system; the mystic yoga system; the practice of mystic yoga; the process of controlling the senses; the science of self-realization or bhakti-yoga; the yoga.
-paraḥplugin-autotooltip__small plugin-autotooltip_bigparah

a supreme or superior; an enemy; another (friend or enemy); beyond; beyond this material creation; comes as an enemy; different; differentiated parts; great; more; next life; not belonging to the same group or family; of the demigods; other; others; sublime; superior; superior quality; supreme; the best; the chief; the supermost; the supreme; the Supreme Personality of Godhead; the Supreme, than whom no one is greater; transcendence; transcendental; transcendental or different; transcendental to material conditions; transcendental to material contamination; transcendental, beyond everything material; ultimate goal; unconnected; who is transcendental.
—always absorbed in trance; nityamplugin-autotooltip__small plugin-autotooltip_bignityam

always; constant; constantly (engaged); constantly; constantly existing; daily; eternal; eternal function; eternally; for all time; forever; from time immemorial; perpetually; regularly; regularly by the principles of nature; regularly, always; the eternal spirit soul; twenty-four hours a day; without cessation, continuously.
—twenty-four hours a day; vairāgyamplugin-autotooltip__small plugin-autotooltip_bigvairāgyam

detachment; dry renunciation; renunciation.
—detachment; samupāśritaḥplugin-autotooltip__small plugin-autotooltip_bigsamupāśritaḥ

taken shelter of.
—taken shelter of; ahaṅkāramplugin-autotooltip__small plugin-autotooltip_bigahaṅkāram

false ego.
—false ego; balamplugin-autotooltip__small plugin-autotooltip_bigbalam

army; Bala; bodily strength; energy; false strength; great strength; influence, army; is actual power; physical strength; power; proper execution; prowess; strength; strength of the body; the power; the soldiers; the strength; the strength of the body; to render possible that which is impossible.
—false strength; darpamplugin-autotooltip__small plugin-autotooltip_bigdarpam

Darpa; false pride; pride.
—false pride; kāmamplugin-autotooltip__small plugin-autotooltip_bigkamam

according to desire; according to his desire; according to His satisfaction; according to the necessities of life; all desires; as He likes; as much as deserved; as much as necessary; as she desires; as you desire; as You like; as you wish; desirable things; desire; desire without reservations; desired; desired objects; desires; desiring to satisfy; everything desirable within this material world; everything needed; lust; lusty; lusty desire; lusty desires; lusty material desires; necessities; of desires; sense gratification; the desire; this sex desire; with full satisfaction.
—lust; krodhamplugin-autotooltip__small plugin-autotooltip_bigkrodham

anger.
—anger; parigrahamplugin-autotooltip__small plugin-autotooltip_bigparigraham

acceptance of material things; arrangement of.
—acceptance of material things; vimucyaplugin-autotooltip__small plugin-autotooltip_bigvimucya

after releasing him; being delivered; having become free from; liberating; releasing immediately.
—being delivered; nirmamaḥplugin-autotooltip__small plugin-autotooltip_bignirmamah

but without taking them seriously; uninterested; with no sense of proprietorship; without a sense of proprietorship; without material affection; without ownership; without proprietorship.
—without proprietorship; śāntaḥplugin-autotooltip__small plugin-autotooltip_bigsantah

devotees; sages; the devotees; those saintly persons.
—peaceful; brahmaplugin-autotooltip__small plugin-autotooltip_bigbrahma

brahma; brāhmaṇas; mantras beginning with oṁ (such as oṁ tad viṣṇoḥ paramaṁ padaṁ sadā paśyanti sūrayaḥ); Veda; Vedas; absolute; Absolute Truth; all my brahminical qualifications; all the Vedas; all the Vedas with their different branches of knowledge; all the Vedas; all transcendental literatures; and brahma; Being; brahma; Brahmaloka; Brahman; brahminical civilization; brahminical culture; by Lord Brahmā; called by the name Brahman; from the activities of Brahman realization or austerity; Gāyatrī hymns; impersonal Brahman; impersonal Brahman realization; is the brāhmaṇas; knowledge of Brahman; Kṛṣṇa; Lord Brahmā; of a brāhmaṇa; of impersonal Brahman; of impersonal Brahman, or the Absolute Truth; of Lord Brahmā; of the brāhmaṇas; of the impersonal effulgence; spirit; spiritual; spiritual kingdom; spiritual knowledge; spiritual nature; spiritual power; Supreme; the brāhmaṇas; the Vedas; the Absolute; the Absolute Truth; the all-pervading Absolute Truth; the brahminical culture; the greatest; the Gāyatrī mantra; the impersonal Brahman (which is an emanation from Kṛṣṇa); the impersonal Brahman; the impersonal Brahman effulgence; the impersonal feature; the Parabrahman, Kṛṣṇa; the personified Vedas; the Supreme; the Supreme Absolute Truth; the Supreme Brahman; the Supreme Brahman, the Personality of Godhead; the Supreme Lord; the Supreme Personality of Godhead; the supreme spirit; the supreme truth, the Absolute Truth, Brahman; the Vedic knowledge; the Vedic literatures; the Vedic wisdom; Transcendence; transcendental; truth; unlimited; Vedic; Vedic knowledge; Vedic sound; without change; You are known as Brahman.
-bhūyāyaplugin-autotooltip__small plugin-autotooltip_bigbhūyāya

for becoming of a similar nature.
—to become self-realized; kalpateplugin-autotooltip__small plugin-autotooltip_bigkalpate

becomes eligible; becomes fit; brings about; can be imagined; capable; does become so; is capable; is considered; is considered eligible; is eligible; is equal; is fit; is meant; is quite befitting; is to be taken that way; is understood; it is so accepted; leads; one imagines; they are meant for administration; to be considered ready.
—is understood. 

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 and who controls the body and the tongue, and is always in trance and is detached, who is without false ego, false strength, false pride, lust, anger, and who does not accept material things, such a person is certainly elevated to the position of self-realization. 

Purport

When one is purified by knowledge, he keeps himself in the mode of goodness. Thus one becomes the controller of the mind and is always in trance. Because he is not attached to the objects of sense gratification, 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-bhūta stage. When one is free from the material conception of life, he becomes peaceful and cannot be agitated.