Text 54]
The History of the Life of Ajāmila
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form of life by understanding the perfect knowledge given by Kṛṣṇa Himself in the Vedic literature, one's life is successful.
TEXT 54
लब्ध्वा निमित्तमव्यक्तं व्यक्ताव्यक्तं भवत्युत ।
यथायोनि यथाबीजं स्वभावेन बलीयसा ॥५४॥
labdhvā nimittam avyaktam vyaktāvyaktam bhavaty uta yathā-yoni yathā-bījam svabhāvena balīyasā
labdhvā —having gotten;  nimittam —the cause;  avyaktam —unseen or unknown to the person;  vyakta-avyaktam —manifested and unmanifested, or the gross body and the subtle body;  bhavati —come into being;  uta —certainly;  yathā-yoni —exactly like the mother;  yathā-bījam —exactly like the father;  sva-bhāvena —by the natural tendency;  balīyasā —which is very powerful.
TRANSLATION
The fruitive activities a living being performs, whether pious or impious, are the unseen cause for the fulfillment of his desires. This unseen cause is the root for the living entity's different bodies. Because of his intense desire, the living entity takes birth in a particular family and receives a body which is either like that of his mother or like that of his father. The gross and subtle bodies are created according to his desire.
PURPORT
The gross body is a product of the subtle body. As stated in  Bhagavad-gītā  (8.6):
yam yam vāpi smaran bhāvam tyajaty ante kalevaram tam tam evaiti kaunteya sadā tad-bhāva-bhāvitaḥ