With emuna, we save ourselves untold anguish.  We know that Hashem has a reason for everything. Even if something is not to our liking, we can reconcile ourselves to the fact that this is Hashem’s will. As soon as we know that Hashem wants things to be a certain way, we can readily accept this, and go through life with much less anxiety and conflict.  ~ R’ Shalom Arush shlita