At the entrance upon our subject, it may be expedient to declare what we mean in this chapter by adulterous love. By adulterous love we do not mean for nicatory love, which precedes marriage, or which follows it after the death of a married partner; neither do we mean concubinage, which is engaged in from causes legitimate, just, and excusatory; nor do we mean either the mild or the grievous kinds of adultery, whereof a man actually repents; for the latter become not opposite, and the former are not opposite, to conjugial love, as will be seen in the following pages, where each is treated of. But by adulterous love, opposite to conjugial love, we here mean the love of adultery, so long as it is such as not to be regarded as sin, or as evil, and dishonorable, and contrary to reason, but as allowable with reason. This adulterous love not only makes conjugial love the same with itself, but also overthrows, destroys, and at length nauseates it. The opposition of this love to conjugial love is the subject treated of in this chapter. That no other love is treated of (as being in such opposition), may be evident from what follows concerning fornication, concubinage, and the various kinds of adultery.