ייִדישער מחשבֿה אויף איוב 2:9

And then there is a thanksgiving that brings the knowledge into someone's heart that the good is true, possible, and exists and that evil is unable to completely eliminate it. And when a difficult time comes to him, he stops and wonders how evil can dwell alongside the good in the world of the Holy One, blessed be He. So he wonders and wonders and does not bless the Holy One, blessed be He, nor His world, with his mouth. But even if he blesses the Holy One, blessed be He, and His world, he still wonders, and he stands up and does not say that the good is false. So good and evil, truth and falsehood, remain in that person's world until he accepts upon himself that, even if it would have been better for him not to be created than to be created, he will add to his life and examine his deeds. And perhaps one day he will know.