"My father has not died. He has changed the body. He has accepted another body." That is the fact. Just like in our sleeping state, dreaming state, my body is lying on the bed, but in dream I create another body and go, say, thousand miles away in a different place. As you have got daily experience, similarly, the gross body being stopped, I, as spirit soul, I do not stop. I work. My mind carries me. My mind is active, my intelligence is active. People do not know that there is another subtle body made of mind, intelligence and ego. That carries me to another gross body. That is called transmigration of the soul.
Therefore one who knows that the spirit soul is eternal, deathless, birthless, ever-new, nityaḥ śāśvato 'yaṁ purāṇaḥ. Nityaḥ śāśvataḥ ayaṁ purāṇaḥ. Purāṇa means very old. We do not know how old we are because we are transmigrating from one body to another. We do not know when we have begun this. Therefore, actually we are very old, but, at the same time, nityaḥ śāśvato 'yaṁ purāṇaḥ. Although very old,... Just like Kṛṣṇa is ādi-puruṣa, the original person. Still, you'll find Kṛṣṇa always a young man of sixteen to twenty years' age. You'll never find Kṛṣṇa's picture as old. Nava-yauvana. Kṛṣṇa is always nava-yauvana. Advaitam acyutam anādim ananta-rūpam ādyaṁ purāṇa-puruṣaṁ nava-yauvanam (Bs. 5.33).