Bhagavad Gita 10.7

He who rightly understands My manifested glory and My creative power attains perfect peace without a doubt.

एतां विभूतिं योगं च मम यो वेत्ति तत्त्वतः।
सोऽविकम्पेन योगेन युज्यते नात्र संशयः॥

etāṃ vibhūtiṃ yogaṃ ca mama yo vetti tattvataḥ|
so'vikampena yogena yujyate nātra saṃśayaḥ||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).