This verse is from the Bhagavad Gita, Chapter 13, Verse 29. The translation is:

• Prakṛtyaiva ca karmāṇi kriyamāṇāni sarvaśaḥ
  Yaḥ paśyati tathātmānam akartāraṁ sa paśyati

• "He who sees that all actions are performed by material nature alone, and that the self is not the doer, truly sees."

In this verse, Lord Krishna explains the deeper understanding of action and the relationship between the self (soul) and nature (prakriti):

1. Prakṛtyaiva ca karmāṇi kriyamāṇāni sarvaśaḥ:

   • All actions in the material world are carried out by Prakriti (material nature).
   • The three gunas (qualities of nature: sattva, rajas, and tamas) drive all activity.
   • The body, senses, and mind, being part of Prakriti, act in response to natural impulses and stimuli.

2. Yaḥ paśyati tathātmānam akartāraṁ:

   • The enlightened one realizes that the Atman (soul) is akartā (non-doer).
   • The self (soul) is the observer, distinct from the activities of the body and mind, which are driven by Prakriti.
   • This understanding frees one from attachment to the results of actions.

3. Sa paśyati:

   • Such a person has attained true vision and wisdom.
   • By realizing that actions belong to nature, and the self is only a witness, they transcend the ego and avoid the false identification with the body and mind as the doer.

This verse emphasizes the distinction between the soul (self) and material nature:

• Actions are inevitable due to the workings of material nature (prakriti), but the soul remains untouched and uninvolved.
• Identifying with the soul as a witness, instead of the body-mind complex, leads to freedom from attachment and suffering.

By recognizing this, one moves closer to liberation (moksha) and aligns with the ultimate truth of existence. This understanding fosters detachment, peace, and an unwavering focus on the eternal reality.