Man and Women: He Created Them by John Paul II
The ultimate source on Marriage IMHO.
It’s a very hefty and deep book and explains everything in detail.
As for my own ideas… Essential to our human nature are our relationships, without which we can not love. God the Father and God the Son are continually loving eachother. We, created in his image and likeness, have it that this is what we should be, always loving. However, as Chesterton answered to the question of what the “fall” means, “whatever I am, I am not myself.” Cardinal Ratzinger, using a favorite phrase of Chesterton’s describes it as Topsy-Turvy. We are born into an upside down world and our goal is to get to the real world, which is with God. We do that by emulating Christ and loving. Jesus Himself says, “I do nothing on my own authority.” The reason that we don’t look at Jesus, and say, wow, what a slave is because he does this out of Love. Only through Love and dependence can we become truly free. Or as the Eagles say, “…and freedom, well that’s just some people talking. Your prison is walking through this world all alone.” Even they get it! We can only become who we are meant to be through Love, otherwise we are slaves to ourselves.
So… what does all this mean to the aims of Marriage. Well, Marriage ends at death, upon which we will hopefully become part of one Body in Christ. Similar language to that used in Marriage that we will become “one flesh.” I think the reason for this is because, being merely human, it is best that we focus on our family first and love them as much as we can and this is the best way to emulate Christ. We simply are not capable of loving everyone as much because we are not what we should be. This doesn’t mean that we shouldn’t try to love everyone, but that God has established this system whereby two people become one flesh and attempt to love eachother more than anyone else on earth by devoting and submitting to eachother. This in turn, helps each to achieve salvation. An act of love by one in that relationships help both achieve salvation. Contrarily, a sin by one, hurts both. So, the chief aim is to assist eachother in reaching eternal salvation, because the chief aim of each individual should be to reach eternal salvation. It just so happens, that within marriage, the aim towards individual salvation is directly related to the spouse’s eternal salvation. They are one and the same thing. And “What therefore God hath joined together, let no man put asunder”