(3) For example, the law that all bodies impinging on lesser bodies, lose as much of their own motion as they communicate to the latter is a universal law of all bodies, and depends on natural necessity. (4) So, too, the law that a man in remembering one thing, straightway remembers another either like it, or which he had perceived simultaneously with it, is a law which necessarily follows from the nature of man. (5) But the law that men must yield, or be compelled to yield, somewhat of their natural right, and that they bind themselves to live in a certain way, depends on human decree. (6) Now, though I freely admit that all things are predetermined by universal natural laws to exist and operate in a given, fixed, and definite manner, I still assert that the laws I have just mentioned depend on human decree. (1.) (7) Because man, in so far as he is a part of nature, constitutes a part of the power of nature. (8) Whatever, therefore, follows necessarily from the necessity of human nature (that is, from nature herself, in so far as we conceive of her as acting through man) follows, even though it be necessarily, from human power. (9) Hence the sanction of such laws may very well be said to depend on man's decree, for it principally depends on the power of the human mind; so that the human mind in respect to its perception of things as true and false, can readily be conceived as without such laws, but not without necessary law as we have just defined it. (2.) (10) I have stated that these laws depend on human decree because it is well to define and explain things by their proximate causes. (11) The general consideration of fate and the concatenation of causes would aid us very little in forming and arranging our ideas concerning particular questions. (12) Let us add that as to the actual coordination and concatenation of things, that is how things are ordained and linked together, we are obviously ignorant; therefore, it is more profitable for right living, nay, it is necessary for us to consider things as contingent. (13) So much about law in the abstract. (14) Now the word law seems to be only applied to natural phenomena by analogy, and is commonly taken to signify a command which men can either obey or neglect, inasmuch as it restrains human nature within certain originally exceeded limits, and therefore lays down no rule beyond human strength. (15) Thus it is expedient to define law more particularly as a plan of life laid down by man for himself or others with a certain object.