एष प्रजापतिर्यद्धृदयमेतद्ब्रह्मैतत्सर्वं त-देतत्त्र्यक्षरं हृदयमिति हृ इत्येकमक्षर-मभिहरन्त्यस्मै स्वाश्चान्ये च य एवं वेदद इत्येकमक्षरं ददत्यस्मै स्वाश्चान्ये च यएवं वेद यमित्येकमक्षरमेति स्वर्गं लोकंय एवं वेद ॥ १ ॥
In plain words
This Prajāpati -- he is the heart. This is Brahman. This is everything. And this word, 'heart', is itself made of three syllables. 'Hṛ' is the first: know this, and both your own people and strangers bring things to you. 'Da' is the second: know this, and both your own people and strangers give to you. 'Yam' is the third: know this, and you reach the heavenly world.
Close to the Sanskrit
This Prajāpati is what the heart is; this [is] Brahman; this [is] everything. This heart, [the word], has three syllables -- thus: 'hṛ' is one syllable -- both his own people and others bring [things] to him who knows thus. 'da' is one syllable -- both his own people and others give to him who knows thus. 'yam' is one syllable -- he who knows thus goes to the heavenly world.