। ॥ २९२ ॥
In plain words
This whole appearance of a world arises in That, the way a city appears reflected inside a mirror. Know 'I am that Brahman,' and you will have accomplished everything there was to accomplish.
Close to the Sanskrit
That [Brahman] in which this appearance of the world [arises], just as a city [is reflected] within a mirror — having known 'I am that Brahman,' you will become one whose purpose is accomplished.