Luther hits the nail on the head again. Lack of faith is the root cause of all sorts of sin, and faith can overcome worldly objections — if you let it. The way he ends this quotation is hilarious. Enjoy!
Finally, we have before us one big, strong objection to answer. Yes, they say, it would be a fine thing to be married, but how will I support myself? I have nothing; take a wife and live on that, etc. Undoubtedly, this is the greatest obstacle to marriage; it is this above all which prevents and breaks up marriage and is the chief excuse for fornication. What shall I say to this objection? It shows lack of faith and doubt of God’s goodness and truth. It is therefore no wonder that where faith is lacking, nothing but fornication and all manner of misfortune follow. They are lacking in this, that they want to be sure first of their material resources, where they are to get their food, drink, and clothing [Matt. 6:31]. Yes, they want to pull their head out of the noose of Genesis 3[:19], “In the sweat of your face you shall eat bread.” They want to be lazy, greedy rascals who do not need to work. Therefore, they will get married only if they can get wives who are rich, beautiful, pious, kind—indeed, wait, we’ll have a picture of them drawn for you.
Luther, M. (1999, c1962). Vol. 45: Luther’s works, vol. 45 : The Christian in Society II (J. J. Pelikan, H. C. Oswald & H. T. Lehmann, Ed.). Luther’s Works (45:III-47). Philadelphia: Fortress Press.