No matter how small his portion, let him rejoice in it. - Moshe ben Maimon

The philosophers likewise assume that in Nature there is nothing in vain, so that everything that is not the product of human industry serves a certain purpose, which may be known or unknown to us.

The third class of evils comprise those which everyone causes to himself by his own action. This is the largest class, and is far more numerous than the second class. It is especially of these evils that all men complain,—only few men are found that do not sin against themselves by this kind of evil. ...This class of evil originates in man's vices, such as excessive desire for eating, drinking, and love; indulgence in these things in undue measure, or in improper manner, or partaking of bad food. This course brings diseases and afflictions upon the body and soul alike.

This idea is confirmed in Scripture; it is distinctly stated that one sole thing, fear of God, is the object of the whole Law with its affirmative and negative precepts, its promises and its historical examples, for it is said, "If thou wilt not observe to do all the words of this Law that are written in this book, that thou mayest fear this glorious and fearful name, the Lord thy God" (Deut. xxviii. 58) This is one of the two purposes of the Akedah (sacrifice or binding of Isaac).