troubles we meet in this respect are due to the desire for superfluous things: when we seek unnecessary things, we have difficulty even in finding that which is indispensable. For the more we desire to have that which is superfluous, the more we meet with difficulties; our strength and possessions are spent in unnecessary things, and are wanting when required for that which is necessary. Observe how Nature proves the correctness of this assertion. The more necessary a thing is for living beings, the more easily it is found and the cheaper it is; the less necessary it is, the rarer and clearer it is. E.g., air, water, and food are indispensable to man: air is most necessary, for if man is without air a short time he dies; whilst he can be without water a day or two. Air is also undoubtedly found more easily and cheaper [than water]. Water is more necessary than food; for some people can be four or five days without food, provided they have water; water also exists in every country in larger quantities than food, and is also cheaper. The same proportion can be noticed in the different kinds of food; that which is more necessary in a certain place exists there in larger quantities and is cheaper than that which is less necessary. No intelligent person, I think, considers musk, amber, rubies, and emerald as very necessary for man except as medicines: and they, as well as other like substances, can be replaced for this purpose by herbs and minerals. This shows the kindness of God to His creatures, even to us weak beings. His righteousness and justice as regards all animals are well known; for in the transient world there is among the various kinds of animals no individual being distinguished from the rest of the same species by a peculiar property or an additional limb. On the contrary, all physical, psychical, and vital forces and organs that are possessed by one individual are found also in the other individuals. If any one is somehow different it is by accident, in consequence of some exception, and not by a natural property; it is also a rare occurrence. There is no difference between individuals of a species in the due course of Nature; the difference originates in the various dispositions of their substances. This is the necessary consequence of the nature of the substance of that species: the nature of the species is not more favourable to one individual than to the other. It is no wrong or injustice that one has many bags of finest myrrh and garments embroidered with gold, while another has not those things, which are not necessary for our maintenance; he who has them has not thereby obtained control over anything that could be an essential addition to his nature, but has only obtained something illusory or deceptive. The other, who does not possess that which is not wanted for his maintenance, does not miss anything indispensable: "He that gathered much had nothing over, and he that gathered little had no lack: they gathered every man according to his eating" (Exod. xvi. 18). This is the rule at all times and in all places; no notice should be taken of exceptional cases, as we have explained.
In these two ways you will see the mercy of God toward His creatures, how He has provided that which is required, in proper proportions, and treated all individual beings of the same species with perfect equality. In accordance with this correct reflection the chief of the wise men says, "All his ways are judgment" (Deut. xxxii. 4); David likewise says: "All the paths of the Lord are mercy and truth" (Ps. xxv. 10); he also says expressly "The Lord is good to all; and his tender mercies are over all his works" (
