This means realization of Kṛṣṇa consciousness. One who is intelligent, by the grace of the Lord, and develops Kṛṣṇa consciousness, is successful in his life because simply by keeping himself in Krishna consciousness, he will be saved from the repetition of birth and death.
In Bhagavad-gītā it is said that one's intelligence is his friend, and the same intelligence can also be his enemy. The same idea is repeated: suhṛdātmanaiva, friendly intelligence. Absorption of intelligence in the personal service of Kṛṣṇa and full consciousness of Kṛṣṇa always are the path of self-realization and liberation. Without being unnecessarily agitated, if we take to the process of Kṛṣṇa consciousness by constantly chanting Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, the cycle of birth and death can be stopped for good.
One does not need any material arrangement to cultivate Kṛṣṇa consciousness. One can cultivate Kṛṣṇa consciousness anywhere and everywhere, provided he can always think of Kṛṣṇa. The mahā-mantra, Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, can be chanted even within the abdomen of one's mother. One can chant while sleeping, while working, while imprisoned in the womb or while outside. This Kṛṣṇa consciousness cannot be checked in any circumstance.
- Srila Prabhupada