Understanding the Bible's teaching on marriage you need to return to the teachings in Genesis 1-3. If you look in chapter 5 of Ephesians, verses 21 to 33, you will see that Paul himself reaches back to Genesis 1, 2 and 3 as the foundation for what he had to say regarding marriage. If you look in fact at the thirty first verse, verse thirty one of that chapter, you will see that it is a direct citation from Genesis chapter 2- -Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh.-