What is that material world? Material world means forgetting Kṛṣṇa. Kṛṣṇa is covered. Kṛṣṇa is there. Kṛṣṇa is aṇḍāntara-stha-paramāṇu. But they have no Kṛṣṇa consciousness. Whole world, you analyze, there is no Kṛṣṇa consciousness, there is no God consciousness. Rather they are declining, "There is no God," "God is dead," "I am God," "You are . . ." Because they have no information, no information of. That is material world. That is the difference between material world and spiritual world. Spiritual world means there is full consciousness of the existence of God, and material world means to full forgetfulness of God. This is the difference between material world and the spiritual world. So if you bring, in the material world also, Kṛṣṇa consciousness, then it is spiritual world. How it is possible? Yes, it is possible. Just like you put one iron rod in the fire, it will become gradually warm, warmer, warmer, then the iron rod will be red hot, and if that redness you will touch anywhere, it will burn you. It is no more iron rod; it is fire. So you keep yourself always in Kṛṣṇa consciousness, then even if you possess this material body, you will be in the spiritual world. This is called jñānam. Jñānam ātma-darśanam, jñānaṁ niḥśreyasāya.
So we have to come to this platform, spiritual platform. We are suffering on account of being on the material platform. So by keeping yourself always in the fire of Kṛṣṇa, or Kṛṣṇa consciousness, you are transferred to the spiritual world. Very nice example, this iron rod, red hot. You cannot use it for any other purpose. It is simply for burning. Similarly, you can become Kṛṣṇa-ized. That we have already discussed in the previous verses. The . . . anyone who is fully absorbed in Kṛṣṇa consciousness in devotional service, he is two kinds of external body, namely the gross body, material body—this gross body made of earth, water, fire, air and sky—and the subtle body made of mind, intelligence and ego. These two kinds of body becomes dissolved. Just like if you eat something, put into your stomach, and if you have got good digestive function, then everything will be digested. Similarly, if you become Kṛṣṇa conscious, spiritualized, the material activities will have no effect. It is dissolved. Otherwise, any material things you will do, it will have repercussion, or reaction. That is stated in the Bhagavad-gītā: yajñārthe karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ (BG 3.9). Yajñārthe. Yajña means Kṛṣṇa, Yajña-puruṣa, Yajñeśvara. Kṛṣṇa's another name is Yajñeśvara. Bhoktāraṁ yajña-tapasām (BG 5.29), Kṛṣṇa says. Yajña-tapasām, bhokta. So therefore there is Yajñeśvara. So whatever you do for Kṛṣṇa, it will have no reaction—digest everything. And if you do not do for Kṛṣṇa, then it will take time to digest.