Jesus deals with the issue of divorce by taking his hearers back to the beginning of creation and to God’s plan for the human race. In Genesis 2:23-24 we see God’s intentionand ideal that two people who marry should become so indissolubly one that they are one flesh. That ideal is found in the unbreakable union of Adam and Eve.
Some Pharisees approached Jesus, and tested him, saying, “Is it lawful for a man to divorce his wife for any cause whatever?” He said in reply, “Have you not read that from the beginning the Creator made them male and female and said, For this reason a man shall leave his father and mother and be joined to his wife, and the two shall become one flesh? So they are no longer two, but one flesh. Therefore, what God has joined together, man must not separate.” They said to him, “Then why did Moses command that the man give the woman a bill of divorce and dismiss her?” He said to them, “Because of the hardness of your hearts Moses allowed you to divorce your wives, but from the beginning it was not so. I say to you, whoever divorces his wife (unless the marriage is unlawful) and marries another commits adultery.” His disciples said to him, “If that is the case of a man with his wife, it is better not to marry.” He answered, “Not all can accept this word, but only those to whom that is granted. Some are incapable of marriage because they were born so; some, because they were made so by others; some, because they have renounced marriage for the sake of the Kingdom of heaven. Whoever can accept this ought to accept it.”
Jesus explains that Moses permitted divorce as a concession in view of a lost ideal. Jesus sets the high ideal of the married state before those who are willing to accept his commands. Jesus, likewise sets the high ideal for those who freely renounce marriage for the sake of the kingdom of heaven.
Both marriage and the single life are calls from God to live a consecrated life, that is to live as married couples or as singles who belong not to themselves but to God.