I shall treat the nature and power of the Affects, and the power of the Mind over them, by the same Method by which, in the preceding parts, I treated God and the Mind, and I shall consider human actions and appetites just as if it were a Question of lines, planes, and bodies.

Most of those who have written about the Affects, and men’s way of living, seem to treat, not of natural things, which follow the common laws of nature, but of things that are outside nature. Indeed they seem to conceive man in nature as a dominion within a dominion. For they believe that man disturbs, rather than follows, the order of nature, that he has absolute power over his actions, and that he is determined only by himself.

Every person should embrace those [dogmas] that he, being the best judge of himself, feels will do most to strengthen in him love of justice.

He who, while unacquainted with these writings, nevertheless knows by the natural light that there is a God having the attributes we have recounted, and who also pursues a true way of life, is altogether blessed.

Nothing comes to pass in nature, which can be set down to a flaw therein; for nature is always the same and everywhere one and thesame in her efficiency and power of action; that is, nature's laws and ordinances whereby all things come to pass and change from one form to another, are everywhere and always; so that there should be one and the same method of understanding the nature of all things whatsoever, namely, through nature's universal laws and rules.