इति त इह व्याघ्रो वा सिँहो वा वृकोवा वराहो वा कीटो वा पतङ्गो वा दँशोवा मशको वा यद्यद्भवन्ति तदाभवन्ति ॥स य एषोऽणिमैतदात्म्यमिदँ सर्वंतत्सत्यँ स आत्मा तत्त्वमसि श्वेतकेतोइति भूय एव मा भगवान्विज्ञापयत्वितितथा सोम्येति होवाच ॥ ३ ॥
In plain words
Thus, whether here they become a tiger, a lion, a wolf, a boar, a worm, a moth, a gadfly, or a mosquito—whatever they are born as, that they remain. That subtle essence is the soul of all this universe. That is the supreme reality, that is the Self, and you are that, O Śvetaketu. 'Explain this to me further, revered sir.' 'So be it, dear one,' he replied.
Close to the Sanskrit
Thus, whether here they become a tiger, or a lion, or a wolf, or a boar, or a worm, or a flying insect, or a gadfly, or a mosquito, whatever they become, that they are. That which is this subtle essence, this whole world has that as its self. That is the truth, that is the Self, you are that, O Śvetaketu. Explain this to me further, revered sir. So be it, dear one, he spoke.