100
[Ch. 2]
the morning, we can understand that the sun is in the sky. Similarly, since there is some consciousness in all bodies—whether man or animal—we can understand the presence of the soul. This consciousness of the soul is, however, different from the consciousness of the Supreme because the supreme consciousness is all-knowledge—past, present and future. The consciousness of the individual soul is prone to be forgetful. When he is forgetful of his real nature, he obtains education and enlightenment from the superior lessons of Kṛṣṇa. But Kṛṣṇa is not like the forgetful soul. If so, Kṛṣṇa’s teachings of  Bhagavad-gītā  would be useless.
There are two kinds of souls—namely the minute particle soul ( aṇu-ātmā ) and the Supersoul (the  vibhu-ātmā ). This is also confirmed in the Kaṭha  Upaniṣad  in this way:
anor anīyān mahato mahīyān  
 ātmāsya jantor nihito guhāyām  
 tam akratuḥ paśyati vīta-śoko  
 dhātuḥ prasādān mahimānam ātmanaḥ  
 (Kaṭha 1.2.20)
“Both the Supersoul  [Paramātmā]  and the atomic soul  [jīvātmā]  are situated on the same tree of the body within the same heart of the living being, and only one who has become free from all material desires as well as lamentations can, by the grace of the Supreme, understand the glories of the soul.” Kṛṣṇa is the fountainhead of the Supersoul also, as it will be disclosed in the following chapters, and Arjuna is the atomic soul, forgetful of his real nature; therefore he requires to be enlightened by Kṛṣṇa, or by His bona fide representative (the spiritual master).
TEXT 21
वेदाविनाशिनं नित्यं य एनमजमव्ययम् । कथं स पुरुषः पार्थ कं घातयति हन्ति कम् ॥ २१ ॥
vedāvināśinaṁ nityaṁ 
    ya enam ajam avyayam 
    kathaṁ sa puruṣaḥ pārtha 
    kaṁ ghātayati hanti kam
veda  —in knowledge;   avināśinam  —indestructible;   nityam  —always;   yaḥ  —one who;   enam  —this (soul);   ajam  —unborn;   avyayam  —immutable;   katham  —