Suffering

Is it alright to question G-d's actions? Shouldn't we have faith that Hashem knows what He is doing? What kind of person challenges Hashem's goodness? Surprisingly enough, Avraham Avinu, Moshe Rabeinu, Yirmiyahu Hanavi, Shlomo Hamelech, Iyov, Chabakuk, and others, all asked the same question: