To demonstrate the oneness that God wants for marriage, with Christ as the foundation and the seal, Donna and Ed use blue, pink, and white sand.Just a month before going to Zambia, we saw our son, Zac and his new bride, Nikki, go through the same procedure. At their wedding, they poured the sand as a picture of their commitment to each other that their lives would forever be mingled together, unable to separate. They committed not only their lives to each other but also their commitment to Christ as their foundation and their seal.