718. Anyone Who Mourns Jerusalem
Shabbat Hazon [the Sabbath preceding the 9th of Av] is a preparation for Shabbat Nachamu [the 1st Sabbath after the 9th of Av], as it is written, “Anyone who mourns Jerusalem is rewarded with seeing the consolation of Jerusalem.” “Anyone who aches with the public is rewarded with seeing the consolation of the public.”
“Mourning” means that he is looking at himself to see how much the Temple has been ruined, meaning that anything of Kedusha [holiness] was ruined and cannot be built. That is, in everything where one sees self-benefit, he is willing to build. But where he sees that there will not be self-benefit, but only for the sake of Kedusha, he has no power to make any movement for the sake of building the Kedusha.