If each side had been frankly contending for its own real wish, they would all have kept within the bounds of reason and courtesy; but just because the contention is reversed and each side is fighting the other side’s battle, all the bitterness which really flows from thwarted self-righteousness and obstinacy and from the accumulated grudges of the last ten years is concealed from them by the nominal or official "Unselfishness" of what they are doing or, at least, held to be excused by it.
C. S. LewisThe Christian idea of marriage is based on Christ's words that a man and wife are to be regarded as a single organism - for that is what the words 'one flesh' would be in modern English. And the Christians believe that when He said this He was not expressing a sentiment but stating a fact - just as one is stating a fact when one says that a lock and its key are one mechanism, or that a violin and a bow are one musical instrument.
C. S. Lewis