The thesis of this book is that God intends that sexual intercourse should be at least implicitly a renewal of the marriage covenant. From this it follows that the marriage covenant provides the criterion to evaluate the morality of every sexual act. Thus the title, Sex and the Marriage Covenant, is an appropriate description of the book's contents. Marriage comes into being by a couple unreservedly entering God's covenant of marriage; contraceptive intercourse contradicts the very essence of the marriage covenant. From these considerations, Kippley developed the covenant theology of sexuality described in this book.