(13) By the help of God, I mean the fixed and unchangeable order of nature or the chain of natural events: for I have said before and shown elsewhere that the universal laws of nature, according to which all things exist and are determined, are only another name for the eternal decrees of God, which always involve eternal truth and necessity. (14) So that to say that everything happens according to natural laws, and to say that everything is ordained by the decree and ordinance of God, is the same thing. (15) Now since the power in nature is identical with the power of God, by which alone all things happen and are determined, it follows that whatsoever man, as a part of nature, provides himself with to aid and preserve his existence, or whatsoever nature affords him without his help, is given to him solely by the Divine power, acting either through human nature or through external circumstance. (16) So whatever human nature can furnish itself with by its own efforts to preserve its existence, may be fitly called the inward aid of God, whereas whatever else accrues to man's profit from outward causes may be called the external aid of God. (17) We can now easily understand what is meant by the election of God. (18) For since no one can do anything save by the predetermined order of nature, that is by God's eternal ordinance and decree, it follows that no one can choose a plan of life for himself, or accomplish any work save by God's vocation choosing him for the work or the plan of life in question, rather than any other. (19) Lastly, by fortune, I mean the ordinance of God in so far as it directs human life through external and unexpected means. (20) With these preliminaries I return to my purpose of discovering the reason why the Hebrews were said to be elected by God before other nations, and with the demonstration I thus proceed. (21) All objects of legitimate desire fall, generally speaking, under one of these three categories: 1. The knowledge of things through their primary causes. 2. The government of the passions, or the acquirement of the habit of virtue. 3. Secure and healthy life.