In Kali-yuga, purify your material senses through chanting Hare Krishna to perceive your eternal nature as Krishna's servant.Listen — Srila Prabhupada Uvaca
Bhagavad-gītā 2.18 — November 23, 1972, Hyderabad 721123BG-HYDERABAD [33:28 Minutes] Bg-02.18_721123BG-HYDERABAD Bhagavad-gītā 2.18 Prabhupāda: ...they are serving the whole body, similarly, Kṛṣṇa is the supreme whole and we are His parts and parcels; therefore our duty is to serve Him. This is our constitutional position. Jīvera svarūpa haya nitya-kṛṣṇa-dāsa [Cc. Madhya 20.108-109].
We cannot become Kṛṣṇa. We are eternally Kṛṣṇa's servitors, part and parcel. This is real conclusion: qualitatively one. Just like this finger, you can call it body, but it is part and parcel of the body.
Similarly, the part and parcel of the Supreme Lord, you may call "God," but he's not the Supreme God. Supreme God is Kṛṣṇa. Īśvaraḥ paramaḥ kṛṣṇaḥ sac-cid-ānanda vigrahaḥ [Bs. 5.1]. So anāśinaḥ aprameyasya. Anāśinaḥ: it cannot be destroyed.
Although it is very minute, aprameyasya... You cannot measure. You have no such measuring method, that you can measure the soul's breadth and..., length and breadth. In geometry, they finish it: "Point has no length and breadth." But that is not the fact.
A point has also length and breadth, but we cannot measure it. Aprameya. Similarly, there is length and breadth of the soul also. That is also mentioned in the Vedic literature.
[aside:] Go little back side. It is said in the Purāṇas: keśāgra-śata-bhāgasya satadhā kalpitasya ca jīvo bhāgasya vijñeyaḥ sa anantāya kalpate [Śvetāśvatara Upaniṣad 5.9] The spirit soul is measured, first of all, divide the tip of your hair into one hundred parts, and then take one part again, and again divide it into one hundred parts. That portion is the measurement of the soul. Or, in other words, one ten-thousandth part of the tip of your hair. Now, we have no measuring instrument.
Therefore, because we have no measuring instrument, although the soul is there within this body, we cannot find it out. Although the soul and the Supersoul both are situated within the heart, and the heart is the center of all vitality, energy of this body... That is accepted. But we have no eyes to see the soul or the Supersoul because these material eyes are blunt, imperfect. You cannot see so many things.