तत्त्वंपदार्थौ निर्णीतौ वाक्यार्थश्चिन्त्यतेऽधुना ।तादात्म्यमत्र वाक्यार्थस्तयोरेव पदार्थयोः ॥ ३७ ॥
In plain words
Having established the meanings of the terms 'That' and 'Thou', the import of the sentence is now examined. The true meaning of the sentence is simply the absolute identity of these two terms.
Close to the Sanskrit
The meanings of the words Tat and Tvam having been determined, the meaning of the sentence is now considered. Identity between those two word-meanings alone is the meaning of the sentence.