Answer a fool according to his folly” (Proverbs 26:4). - Moshe ben Maimon

Those who wash their body and cleanse their garments whilst they remain dirty by bad actions and principles, are described by Solomon as "a generation that are pure in their own eyes, and yet are not washed from their filthiness; a generation, oh how lofty are their eyes!" &c. (Prov. xxx. 12-13). Consider well the principles which we mentioned... as the final causes of the Law; for there are many precepts, for which you will be unable to give a reason unless you possess a knowledge of these principles...

Those who observe the nature of the Universe and the commandments of the Law, and know their purpose, see clearly God's mercy and truth in everything; they seek, therefore, that which the Creator intended to be the aim of man, viz., comprehension. Forced also by claims of the body, they seek that which is necessary for the preservation of the body, "bread to eat and garment to clothe," and this is very little; but they seek nothing superfluous; with very slight exertion man can obtain it, so long as he is contented with that which is indispensable.

A sensible man should not demand of me, or hope that when we mention a subject, we shall make a complete exposition of it.