It is often said that Moshiach will be a person at the level of the greatest people in Jewish history (i.e., Moshe/Moses, Dovid/David, etc.), since it says in Yeshayahu (הִנֵּה יַשְׂכִּיל עַבְדִּי יָרוּם וְנִשָּׂא וְגָבַהּ מְאֹד).
Now, considering the concept of Yeridas Hadoros (the continuous spiritual decline of the generations), how is it possible to have a person today that is on the level of these people?
One possible answer I thought of is that it may mean that only once Hashem decides that he chooses this person, he will then exalt him, etc, but not that the person himself could reach that spiritual level himself (in other words, not that this person could be that sin-free, righteous, etc., as were the Avos, etc.).
Any thoughts?