Every Atma is part of this cosmic body which makes Paramatma, the only One Reality.

Sankhya Yoga

Chapter 2, Verse 30

 

dehī nityam avadhyo’yaṁ 

dehe sarvasya bhārata 

tasmāt sarvāṇi bhūtāni 

na tvaṁ śocitum arhasi

 

This dweller in the body of everyone is eternal and indestructible, O Bharata, therefore, you should not grieve for any creature.

 

Here Krishna explains that the soul, the dweller in the bodies of all living entities, can never be killed. The Lord says that in the bodies of all human beings in this world, there resides only One Supreme Soul. It is only due to ignorance that one sees differences in the diverse bodies. In reality, there is no diversity: there is only One Supreme Soul which we are all connected to, and which we are all part of. What is in me, is in you. It is in Arjuna. It is in Krishna. Lord Krishna reminds Arjuna, “I am in everyone as the Supreme Soul, Paramatma.” Every Atma is part of Paramatma: every Atma is part of this cosmic body which makes Paramatma, the only One Reality. He uses the word ‘indestructible’: this ultimate reality, the soul, can never be destroyed. It can never be destroyed by anything or by anyone. Again and again Krishna says, “Don’t grieve. Arjuna, prepare yourself to fight!”

Bhagavad Gita