If the infinitesimal soul merges his individuality, or inherent personality, with the infinite being, then that individuality is rendered worthless. Those who want to commit spiritual suicide by sacrificing their individuality are a breed by themselves. Such self-destroyers are known as pure monists. On the other hand, those who desire to maintain their individuality are dualists, or personalists.
Once the jīva manifests his original transcendental nature, he is easily liberated from material conditioning, yet even in such an elevated state he does not lose his individual identity as a spirit soul. In fact, in that pure state he engages in the eternal service of the Supreme Lord and relishes the immortal nectar of sublime bliss.
For eons, all over the world, research on the subject of kṣetra and kṣetra-jña has been going on. In India the six philosophical schools have extensively discussed this topic, but this discussion has merely been an exercise in logic and sophistry that has led to many differing opinions among the sages. Hence none of these schools has truly practiced jñāna-yoga, the path of perfect knowledge. Only when discussion of kṣetra and kṣetra-jña is applied in the Lord's service does the exercise become jñāna-yoga.
The process of jñāna-yoga has been delineated in the Vedānta-sūtra, the philosophical essence of the Vedas. The Supreme Lord, Kṛṣṇa, accepts the authority of the Vedānta-sūtra and considers the philosophical presentation proper. Up till the present day, every spiritual line, even in the impersonalist school, has based its philosophical authority on the Vedānta-sūtra. And the Śrīmad-Bhāgavatam is the natural and faultless commentary on the Vedānta-sūtra. This is Lord Caitanya's opinion.