The ideal that marriage aims at is that of spiritual union through the physical. The human love that it incarnates is intended to serve as a stepping stone to diving or universal love.
Men and women -- even man and wife are foreigners. Each has reserves that the other cannot enter into, nor understand. These have the effect of frontiers.
Marriage is an institution that teaches a man regularity, frugality, temperance, forbearance and many other splendid virtues he would not need had he stayed single.
Come, let's be a comfortable couple and take care of each other! How glad we shall be, that we have somebody we are fond of always, to talk to and sit with.
That's how it will be, except that in reality, both today and later, one will stand there with a palpable body and a real head, a real forehead, that is, for smiting on with one's hand.