Mind being engaged always in Kṛṣṇa consciousness, there is no chance of its being engaged in māyā consciousness. The more we engage our mind in Kṛṣṇa consciousness, the more you keep yourself in the sunlight, there is no chance of getting into darkness. That is the process. If you like—you are at liberty—you can keep yourself within the room in darkness, and you can come in the broad daylight. That depends on your choice. But when you come in the broad sunlight, there is no chance of darkness.
Darkness can be eradicated by light, but light cannot be covered by darkness. Suppose you are in a dark room. You bring one lamp, the darkness over. But you take something dark and go to the sunlight, oh, it will fade away. So kṛṣṇa sūrya-sama māyā haya andhakāra (CC Madhya 22.31).
Kṛṣṇa is just like sunlight, and māyā is just like darkness. So what darkness will do in sunlight? You keep yourself in sunlight, darkness will fail to act upon you. This is the whole philosophy of Kṛṣṇa consciousness. Keep always yourself engaged in Kṛṣṇa consciousness activities. Māyā will not be able to touch you. Because there is no possibility of darkness becoming influential in light.
That is stated in the Śrīmad-Bhāgavatam, that when Vyāsadeva, under the instruction of his spiritual master, Nārada, by bhakti-yoga: bhakti-yogena praṇihite samyak, praṇihite 'male. Bhakti-yogena manasi (SB 1.7.4).
The same mind—manasi means mind—when enlightened by bhakti-yoga, bhakti-light, bhakti-yogena manasi samyak praṇihite amale, when the mind becomes completely freed from all contamination. That can be done by bhakti-yoga. Bhakti-yogena manasi samyak praṇihite 'male apaśyat puruṣaṁ pūrṇam: he saw the Supreme Personality of Godhead.