R' Zundel of Salant Zatzal said: כָּל עַכָּבָה לְטוֹבָה every setback is for the good. Waiting for a red light, or waiting for the dentist, or a shidduch, or having children, or finding a job, or getting an apartment, are all called: עִיכּוּבִים setbacks. R' Yerucham Zatzal says that waiting is a form of torture. The whole essence of Klal Yisroel is the result of Sara and Avraham's waiting happily overtime for Yitzchok, for practicing patience, and being M'kabel Yissurim B'ahavah.
As a young bachur I had difficulties, and I went to the Mashgiach of Lakewood, R' Nosson Wachtfogel Zatzal. He told me: “Don't worry, Hashem knows what He's doing”. That took care of all my problems right there
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Don't make small all those endless Yissurim in your life, e.g., when your telephone is betraying you, you keep waiting with frustration to meet someone, or to finally have the Yeshua that you desperately need. When you value this pain you go places, and you become great in your Emuna and Bitachon and being M'kabel Yissurim B’ahavah. This is all Le'chatchila and Min HaShamayim. אַשְׁרֵי חֶלְקְכֶם Fortunate is your lot! And Hashem is testing you in order to make you an Adam Gadol. Your Neshama desperately needs this form of Tikun for your Shleimus. Don't think it's unnecessary, and don't blame others who keep you waiting.
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As long as you try to work on it, it's already a major Zechus. Aderaba, those who struggle with Bitachon and have difficulties in that area are by far the most fortunate and lucky people. Without a question they can expect the most phenomenal rewards in this world and the next world.