Bg. 6.34

चञ्चलं हि मनः कृष्ण प्रमाथि बलवद् दृढम् ।
तस्याहं निग्रहं मन्ये वायोरिव सुदुष्करम् ॥३४॥

Text

cañcalaṁ hi manaḥ kṛṣṇa
pramāthi balavad dṛḍham
tasyāhaṁ nigrahaṁ manye
vāyor iva su-duṣkaram

Synonyms

cañcalamplugin-autotooltip__small plugin-autotooltip_bigcañcalam

flickering.
—flickering; hiplugin-autotooltip__small plugin-autotooltip_bighi

addressed; all; also; and above all; and exactly; as a matter of fact; assuredly; because; because of which; certainly; certainly are; exactly; exactly like; for; for this reason; from which; in deed; in fact; indeed (You can be realized by the devotees); indeed; is certainly; only; positively; reason of; since; surely; than; though; thus; undoubtedly; without fail.
—certainly; manaḥplugin-autotooltip__small plugin-autotooltip_bigmanah

and of the mind; and the mind; attention; by meditation; by mind; by the acts of the mind; by the mind; complete attention; heart; her mind; his mind; how the mind is working; in terms of the mind; in the mind; like the mind; mind; minds, hearts; my mind; of the mind; of the minds; of the strength of enthusiasm; that mind; the mind (full of material desires for eating, sleeping, mating and defending); the mind; the mind in such a situation; the minds; the subject matter of thought for the mind; their minds; to the mind; with mind; with the mind.
—mind; kṛṣṇaplugin-autotooltip__small plugin-autotooltip_bigkrsna

//kṛṣ-ṇa//; about Kṛṣṇa; and Kṛṣṇa; black; Hare Kṛṣṇa; in Kṛṣṇa; is Lord Kṛṣṇa; Kṛṣṇa; Kṛṣṇa is now present; Kṛṣṇa, the Supreme Personality of Godhead; Lord Kṛṣṇa; Lord Kṛṣṇa Himself; Lord Kṛṣṇa's; Lord Kṛṣṇa's holy name; Lord Kṛṣṇa's name; Lord Śrī Kṛṣṇa; My dear Kṛṣṇa; O Kṛṣṇa; O Lord Kṛṣṇa; O my Lord Kṛṣṇa; of Kṛṣṇa; of Lord Kṛṣṇa; of Lord Śrī Kṛṣṇa; of the holy name of Kṛṣṇa; of the holy name of Lord Kṛṣṇa; of the mode of ignorance; the Deity of Lord Kṛṣṇa; the holy name Kṛṣṇa; the holy name of Kṛṣṇa; the holy name of Lord Kṛṣṇa; the Lord; the name of Kṛṣṇa; the Personality of Godhead; the Personality of Godhead, Kṛṣṇa; the presence of Lord Kṛṣṇa; the Supreme Absolute Personality of Godhead; the Supreme Lord; the Supreme Lord Kṛṣṇa; the Supreme Lord, Śrī Kṛṣṇa; the Supreme Personality of Godhead; the Supreme Personality of Godhead, Lord Kṛṣṇa; to Lord Kṛṣṇa; unto Lord Kṛṣṇa; Śrī Kṛṣṇa.
—O Kṛṣṇa; pramāthiplugin-autotooltip__small plugin-autotooltip_bigpramāthi

agitating.
—agitating; balavatplugin-autotooltip__small plugin-autotooltip_bigbalavat

possessed of strength; strong.
—strong; dṛḍhamplugin-autotooltip__small plugin-autotooltip_bigdrdham

deep; deeply; determined; firmly; firmly fixed; greatly; obstinate; so firmly convinced or fixed in your decision; solidly; very.
—obstinate; tasyaplugin-autotooltip__small plugin-autotooltip_bigtasya

and from him; Bali Mahārāja; before him (King Rantideva); by Him; by His; for Him; for that purpose; for the King; from him (Aśvamedhaja); from him (Devakṣatra); from him (Mahīnara); from him (Punarvasu); from him (Vibhu); from him; from Samaratha; he; his (Agnivarṇa's); his (Dakṣa's); his (Dhruva Mahārāja's); his (Jīmūta's son); his (Mahārāja Bharata's); his (Maitreya's); his (Nandīśvara's); his (Niṣāda's); his (of Mahārāja Parīkṣit); his (Purañjaya's); his (Purūravā's); his (Rantināva's); his (Sandhi's); his (son); His (the gigantic form's); his (the sage's); his (Vikukṣi's); his (Vyāsa's); his; his dead body; his son; in the service of Purañjaya; its; of Bali Mahārāja; of Citrasena; of Devamīḍha; of Dhruva; of Dhruva Mahārāja; of Durvāsā; of Gādhi; of He who is the Supreme Lord; of him (a student studying the //Vedas//); of him (Ajāmila); of him (Ambarīṣa); with him.
—its; ahamplugin-autotooltip__small plugin-autotooltip_bigaham

as far as I am concerned; as I am; egotism; false ego; false identification (in the bodily concept of life); false identity; I ("I am this body"); I (am); I (Kṛṣṇa); I (Lord Brahmā); I (Lord Śiva); I (Prahlāda Mahārāja); I (the person desiring release from material life); I (Śukadeva Gosvāmī); I; I am; I am everything; I am independent; I am the material body; I myself; I, Lord Kṛṣṇa; I, the Personality of Godhead; I, the Supreme Personality of Godhead; I, Yamarāja; me; my existence ("I am something"); my humble self; myself (Brahmājī); Myself; the word //aham//; the wrong mental conception.
—I; nigrahamplugin-autotooltip__small plugin-autotooltip_bignigraham

punishment; subduing.
—subduing; manyeplugin-autotooltip__small plugin-autotooltip_bigmanye

accept; although I think; I consider; I have vowed; I shall consider; I take it for granted; I think; I understand; think; we think.
—think; vāyoḥplugin-autotooltip__small plugin-autotooltip_bigvāyoḥ

from air; of air; of the air; of the demigod Vāyu (controller of air); of the moving airs; of the wind; that of Vāyu; the wind carries.
—of the wind; ivaplugin-autotooltip__small plugin-autotooltip_bigiva

almost the same; as; as if; as if it were so; as it; as it is; as it is so; as it was; as it were; as though; certainly; exactly; exactly like; exactly like that; in pursuance of; in the manner of; indeed; just as; just like; like (just as a king exacts taxes for the benefit of the servant or the citizens pay taxes for the benefit of the king); like; like that; like that of; like this; likened; or; quite; seemingly; similarly; simply; somewhat; thus.
—like; suduṣkaramplugin-autotooltip__small plugin-autotooltip_bigsuduṣkaram

difficult.
—difficult. 

Translation

For the mind is restless, turbulent, obstinate and very strong, O Kṛṣṇa, and to subdue it is, it seems to me, more difficult than controlling the wind. 

Purport

The mind is so strong and obstinate that it sometimes overcomes the intelligence, although mind is supposed to be subservient to the intelligence. For a man in the practical world who has to fight so many opposing elements, it is certainly very difficult to control the mind. Artificially, one may establish a mental equilibrium toward both friend and enemy, but ultimately no worldly man can do so, for this is more difficult than controlling the raging wind. In the Vedic literatures it is said: 

ātmānaṁ rathinaṁ viddhi śarīraṁ ratham eva ca
buddhintu sārathiṁ viddhi manaḥ pragraham eva ca
indriyāṇi hayānāhur viṣayāṁs teṣu gocarān
ātmendriya-mano-yukto bhoktety āhur manīṣiṇaḥ.

“The individual is the passenger in the car of the material body, and intelligence is the driver. Mind is the driving instrument, and the senses are the horses. The self is thus the enjoyer or sufferer in the association of the mind and senses. So it is understood by great thinkers.” Intelligence is supposed to direct the mind, but the mind is so strong and obstinate that it often overcomes even one’s own intelligence. Such a strong mind is supposed to be controlled by the practice of yoga, but such practice is never practical for a worldly person like Arjuna. And what can we say of modern man? The simile used here is appropriate: one cannot capture the blowing wind. And it is even more difficult to capture the turbulent mind. The easiest way to control the mind, as suggested by Lord Caitanya, is chanting “Hare Kṛṣṇa,” the great mantra for deliverance, in all humility. The method prescribed is sa vai manaḥ kṛṣṇa-padāravindayoḥ: one must engage one’s mind fully in Kṛṣṇa. Only then will there remain no other engagements to agitate the mind.