Everything is for the best – this level of emuna is not some spiritual plateau that few can obtain.  The Code of Jewish Law (Shulchan Oruch, Orach Chaim 230:5) requires each of us to believe that everything Hashem does is for the very best.  Just as every Jew has the obligation to eat kosher food, to observe the Sabbath, and to comply with any other statute in the Code of Jewish Law, he or she is required to fulfill the above statute OC 230:5 as well.” ~ The Garden of Emuna.