। ॥
In plain words
The body does not say 'I'. And no one says, 'In deep sleep I did not exist.' Once that 'I' has risen, everything rises. With a keen mind, search out the birthplace of this 'I'.
Word for word
The body says not 'I'. In deep sleep, 'I was not': no one at all says this. When that has risen, everything rises. With a keen mind search out the birthplace of the 'I'.