Next come the neighbor's animals, who do not have the faculty of speech, and lastly, to include the neighbor's inanimate moveable property, (5:18 in NJPS) says "and anything that is your neighbor's." Maimonides cited the words of "And you shall love God, your Lord, with all your heart, with all your soul, and with all your might," for the proposition that even when one's life is threatened, one should not commit one of the three sins of the worship of false gods, forbidden sexual relations, and murder. The words "with all your soul" in imply: even if it takes one's soul. The parashah is discussed in these modern sources:  The 18th-century German Jewish philosopher Moses Mendelssohn read the admonition of "Therefore, know and take it to heart that the Lord alone is God, in heaven above and on the earth below, and there is none else," along with that of "Hear, O Israel, the Eternal, our God, is a unique, eternal being!" to demonstrate that whenever it is a question of the eternal truths of reason, Scripture does not say "believe," but "understand" and "know," in order that we may know that the Eternal is the true God, and there is no other. Nowhere does Scripture say: "Believe, O Israel, and you will be blessed; do not doubt, O Israel, or this or that punishment will befall you." Thus Mendelssohn concluded that Scripture does not command faith, but accepts no other commands than those that come by way of conviction. Its propositions are presented to the understanding, submitted for consideration, without being forced upon our belief. Belief and doubt, assent and opposition, in Mendelssohn's view, are not determined by desire, wishes, longings, fear, or hope, but by knowledge of truth and untruth. Hence, Mendelssohn concluded, ancient Judaism has no articles of faith. The 20th century Reform Rabbi Gunther Plaut argued that the discussions of cities of refuge in and and were composed during a later, settled period, in order to accommodate the disappearance of local altars that previously served as places of refuge. Explaining the origins of the law that one can see in the Cities of Refuge, Justice Oliver Wendell Holmes Jr. wrote that early forms of legal procedure were grounded in vengeance. Roman law and German law started from the blood feud, which led to the composition, at first optional, then compulsory, by which the feud was bought off.