Берешит 4:3 Каббала: Zohar

וַֽיְהִ֖י מִקֵּ֣ץ יָמִ֑ים וַיָּבֵ֨א קַ֜יִן מִפְּרִ֧י הָֽאֲדָמָ֛ה מִנְחָ֖ה לַֽיהוָֽה׃

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Zohar

Mark this! As Job kept evil separate from good and failed to fuse them, he was judged accordingly: first he experienced good, then what was evil, then again good. For man should be cognizant of both good and evil, and turn evil itself into good. This is a deep tenet of faith.