His "ultimate expectation" would be that all living beings live in harmony and peace. His motive behind asking people to keep quiet for sometime is to make them introspect their actions because self-examination will help us think logically and get new perspectives.
If this question was asked by your teacher then answer something like "The poet wants all the living beings to self-analyse themselves by staying silent for a moment and after this analysis, they will get new perspectives which will help them live in peace and harmony."
