Lord Nṛsiṁhadeva wanted to bestow benedictions upon Prahlāda Mahārāja, one after another, but Prahlāda Mahārāja, thinking them impediments on the path of spiritual progress, did not accept any of them. Instead, he fully surrendered at the Lord's lotus feet. He said: "If anyone engaged in the devotional service of the Lord prays for personal sense gratification, he cannot be called a pure devotee or even a devotee. He may be called only a merchant engaged in the business of give and take. Similarly, a master who wants to please his servant after taking service from him is also not a real master." Prahlāda Mahārāja, therefore, did not ask anything from the Supreme Personality of Godhead. Rather, he said that if the Lord wanted to give him a benediction, he wanted the Lord to assure him that he would never be induced to take any benedictions for the sake of material desires. Exchanges of devotional service for lusty desires are always very prominent. As soon as lusty desires awaken, one's senses, mind, life, soul, religious principles, patience, intelligence, shyness, beauty, strength, memory and truthfulness are all vanquished. One can render unalloyed devotional service only when there are no material desires in one's mind.
(Srimad Bhagavatam---7:10-summary).

If one wants to make steady progress on the path of self-realization, he must try to control the forces of the material senses. There are the forces of talk, forces of anger, forces of mind, forces of the stomach, forces of the genitals, and forces of the tongue. One who is able to control the forces of all these different senses, and the mind, is called gosvāmī, or svāmī. Such gosvāmīs live strictly controlled lives, and forgo altogether the forces of the senses. Material desires, when unsatiated, generate anger, and thus the mind, eyes and chest become agitated. Therefore, one must practice to control them before one gives up this material body. One who can do this is understood to be self-realized and is thus happy in the state of self-realization. It is the duty of the transcendentalist to try strenuously to control desire and anger.
(Bhagavad-Gita--5:23---purport).

For one who has conquered the mind, the Supersoul is already reached, for he has attained tranquillity. To such a man happiness and distress, heat and cold, honor and dishonor are all the same.
Actually, every living entity is intended to abide by the dictation of the Supreme Personality of Godhead, who is seated in everyone's heart as Paramatma. When the mind is misled by the external, illusory energy, one becomes entangled in material activities. Therefore, as soon as one's mind is controlled through one of the yoga systems, one should be considered to have already reached the destination. One has to abide by superior dictation. When one's mind is fixed on the superior nature, he has no alternative but to follow the dictation of the Supreme. The mind must admit some superior dictation and follow it. The effect of controlling the mind is that one automatically follows the dictation of the Paramatma, or Supersoul. Because this transcendental position is at once achieved by one who is in Krsna consciousness, the devotee of the Lord is unaffected by the dualities of material existence, namely distress and happiness, cold and heat, etc. This state is practical samadhi, or absorption in the Supreme.
(Bhagavad-Gita---6:7--translation and purport).

Gradually, step by step, one should become situated in trance by means of intelligence sustained by full conviction, and thus the mind should be fixed on the self alone and should think of nothing else.
By proper conviction and intelligence one should gradually cease sense activities. This is called pratyāhāra. The mind, being controlled by conviction, meditation, and cessation from the senses, should be situated in trance, or samādhi. At that time there is no longer any danger of becoming engaged in the material conception of life. In other words, although one is involved with matter as long as the material body exists, one should not think about sense gratification. One should think of no pleasure aside from the pleasure of the Supreme Self. This state is easily attained by directly practicing Kṛṣṇa consciousness.
(Bhagavad-Gita---6:25---translation and purport).