Kāthakopaniṣat Bhāshya (काठकोपनिषत् )
2.3.02
Everything in this world moves by the force of life (Prāṇa). Emanating from it is a great fear, like a raised thunderbolt. Those who understand this become immortal.
Bhāṣya 2.3.02
The great fear comes from not following their 'svadharma', i.e. their own duty.
That Lord Hari, called the life force (Prāṇa) moves in all. Indeed, he emerges like a thunderbolt and instills fear when one transgresses their 'svadharma', i.e. their own duty.

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बहुचित्रजगद्बहुधाकरणात् परशक्तिरनन्तगुणः परमः ।
सुखरूपममुष्य पदं परमं स्मरतस्तु भविष्यति तत्सततम् ॥
"The one who has created this variegated vast universe with varied forms has infinite power and is of infinite auspicious qualities. He certainly bestows the highest state of bliss to those who meditate on his ever happy essence." -Dwādasha stōtra 4.3

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