Incredible as it may seem, we can no longer assume that people in our culture understand what the proper definition of “marriage” and “the family” is. Not only is this a sad commentary on the impact of same-sex marriage activists on our society, it also shows how the culture’s memory of the biblical tradition on which it is largely based is fading fast. What is marriage, biblically defined? And what is the biblical definition of a family? In this brief treatise on marriage and the family, we will take up these questions and proceed to discuss a number of related matters, such as singleness, divorce and remarriage, and homosexuality, in an effort to develop a full-orbed understanding of the biblical teaching on the subject. As I have sought to demonstrate at some length in my book God, Marriage, and the Family: Rebuilding the Biblical Foundation, marriage and the family are institutions under siege today, and only a return to the biblical foundation of these God-given institutions will reverse the decline of marriage and the family in our culture today.