स य एवमेतत्साम सर्वस्मिन्प्रोतं वेद सर्वं ह भवति ॥ २.२१.२ ॥
sa ya evametatsāma sarvasminprotaṃ veda sarvaṃ ha bhavati || 2.21.2 ||
2. He who knows that this Sāma is in everything becomes one with everything [or, becomes the Lord of everything].
Saḥ yaḥ evam etat sāma sarvasmin protam veda, he who knows that this Sāma resides in everything; sarvam ha bhavati, he becomes everything.
This is an example of how far the benefit of the knowledge of the Sāma can extend: If you know that the Sāma is everywhere and in everything, you become the supreme Lord of everything.