Marriage is a basic human and social institution. Though it is regulated by civil laws and church laws, it did not originate from either the church or state, but from God. Therefore, neither church nor state can alter the basic meaning and structure of marriage. Marriage, whose nature and purposes are established by God, can only be the union of a man and a woman and must remain such in law. In a manner unlike any other relationship, marriage makes a unique and irreplaceable contribution to the common good of society, especially through the procreation and education of children. The union of husband and wife becomes, over a lifetime , a great good for themselves, their family, communities, and society. Marriage is a gift to be cherished and protected.