Some Pharisees approached him, 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'?…
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." (Mt 19:3-12)
People think that because they have the reason to do it, they think that they are right in doing it. (Moses has given the law and that is enough reason to do it and hence it should be right). Jesus says that there is a flaw in their thinking because the intention at the beginning was different from the present practice. Jesus is quite clear that the Bible does not encourage divorce.
God wanted real people. He wanted people who were willing, intelligent, obedient, and loyal to God and others. God did not want people who would be carried away by whims and fancies. Marriage is one of the ways through which the image of one true God would be revealed. God created them in his own image and likeness. Oneness of God is revealed in the oneness of man and woman.
The statement by the disciples brings out a cryptic saying from Jesus regarding marriage and remaining without marriage. Yes some are born so, and there are others who are made so for a particular purpose (slaves we castrated to work in the palace). But some choose not to marry so that they could devote themselves exclusively for the work of the kingdom of God. John the Baptist was one and Jesus himself was another. It is the personal decision of the individual because of the demand of his vocation and mission in particular.
