In plain words
This is what the Upaniṣad says as “Īśāvāsyam”. This world itself is what is fit for Parameśvara to dwell in, and what He dwells in; in it there is no room for self-will or for selfishness. That is why the word of the ṛṣis commanded that the Ānanda given by Him who is all Ānanda be enjoyed without attachment, with a spirit of sacrifice and with the feeling that all is the Lord's.