Chazal say: רָדֲא סָנְכִנֶשִּׁמ ˂ָכּ ,הָחְמִשַׂבּ ןיִטֲעַמְמ בָא סָנְכִנֶשִׁמֶּשׁ םֵשְׁכּ הָחְמִשַׂבּ םיִבְּרַמ תענית כט א in “Av” we decrease our Simcha level, and in “Adar” we lift it. Notice how Simcha is what life is all about. Just that sometimes we have more Simcha and sometimes less. Our religion is total-positive. All evil in our lives is heading for total good!
Just like on Purim we say: הוּא˂וֹפֲהַנְו V'nahapoch Hu, with all the evil disappearing, and now we have Mordechai in Haman’s place; the same on Tisha B’av; emanating from the pain of Aveilus Bais Hamikdash comes a Simcha. All the evil and sadness will someday become Simcha, like Chazal say: הָּתָחְמִשְׂב הֶאוֹרְו הֶכוֹז םִיַלָשׁוּרְי לַע לֵבַּאְתִמַּה לָכּ תענית ל ב since we mourned over it, we will be Zoche to see the Simcha of Yerushalayim. Similarly, your worst sin will someday become the biggest Mitzva (when you do Teshuva).
A Baal Yissurim ends up with the most goodness. The Seforim HaKedoshim say: ָכּ ַה ל ְמדוּ ֶכּ ְבּ ה ִיסוּ ִר ָבּ םיעוֹ ַה"ז זוֹ ֶכ ְו הרוֹ ֶא ה עוֹ ַה בּ". The more Yissurim a person has on this world, the more pleasures in the next world. Hashem has tremendous Rachmanus on all those people who suffer, and He will make sure to be: ְמ ַה ֵפּ˂ תֶאהָכָרְבִל הָלָלְקַּה turn around the curse into a blessing. Chazal say: בוֹט רַעַצְבּ אֹלֶֹש הָאֵמִמ רַעַצְבּ תַחַא םַעַפּ It’s worth way more when it’s harder.
Chazal say: ףָדְּרִנ תֶא שֵׁקַּבְי םיִק˄ֱאָהְוקהלת ג טו Hashem sticks up for the victim; even if the victim is a Rasha who is being persecuted by a Tzaddik, yet Hashem will still stick up for this victim, who is a Rasha! Look how precious are Yissurim! And by Leah it says: הָאֵל הָאוּנְשׂ יִכּ 'ה אְרַיַּוהָּמְחַר תֶא חַתְּפִיַּו אל טכ אציו Hashem saw that Leah was rejected, so He gave her a child. The Alter of Kelm Zatzal says that it wasn’t her Ma'asim Tovim or Tefilos that caused her to be Zoche to 6 Shevotim; it was her pain of being a: הָאוּנְשׂ reject!
