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.
“I should say that my wife and I, while still Protestants, found the first edition of this work to be so luminous and compelling as to help change our minds on the matter of contraception.”Scott Hahn, Author, Rome Sweet Home
"A veritable mine of information, Sex and the Marriage Covenant is must reading for anyone concerned with marriage, sexuality, and the family."William E. May, Author, Marriage: The Rock on Which the Family is Built
John F. Kippley has been active in the family planning movement since 1968 and co-authored The Art of Natural Family Planning with his wife, Sheila.