How Does God Define Marriage?

There is no doubt that God designed marriage. Genesis 2 shows God creating a helper and completer for Adam because it was "not good" for man to be alone. In all of his creation, this was the first thing that God declared was not good. So he created Eve, and the Bible states in Genesis 2:24, "Therefore a man shall leave his father and his mother and hold fast to his wife, and they shall become one flesh." God designed marriage from the beginning, and God does not design anything without purpose.