When a devotee is completely purified, he becomes anyābhilāṣitā-śūnya. In other words, all of his material desires become zero, being burnt to ashes, and he exists either as the Lord's servant, friend, father, mother or conjugal lover. Because one thinks constantly in this way, one's present material body and mind are fully spiritualized, and the needs of one's material body completely vanish from one's existence. An iron rod put into a fire becomes warmer and warmer, and when it is red hot it is no longer an iron rod but fire. Similarly, when a devotee constantly engages in devotional service and thinks of the Lord in his original Kṛṣṇa consciousness, he no longer has any material activities, for his body is spiritualized. Advancement in Kṛṣṇa consciousness is very powerful, and therefore even during this life such a devotee has achieved the shelter of the lotus feet of the Lord.