The following is a pshat from the Siach Yitzchak on a passuk in Ashrei
??????????? ???????? ???? ????????. ???????????????? ?????? ???? ????
What is the difference between ??????????? and ??????????????? Additionally, why is ?????????????? eternal (???? ????????) while ?????????????? is referred to as ?????? ???? ?????
The Gra says that ??????????? refers to “with ratzon” and ?????????????? is without ratzon.
We say in davening ???? ??’ ???????????. ???????? ?????????, in reference to Klal Yisroel, Hashem is Melech. And we see the connection to Melech and Ratzon in our ma’ariv tfillos (??????????? ???????? ???????? ????????).
By the other nations, Hashem is a Moshel, but after Moshiach comes, we refer to Hashem as ” ????????? ??’ ???????????:
??????? ?’ ???????? ??? ???? ???????. ??????? ?????? ??????? ?’ ????? ??????? ?????”
This is why we say ??????????? ???????? ???? ????????, when it is with ratzon, from Yisroel, it is everlasting. But ?????????????? how Hashem currently rules over the other nations ?????? ???? ???? it is only from every generation until Moshiach comes.