You might say, too, that in general, without God, everything falls apart. There are only two ways to live life, according to truth, or according to anything else. With God, or without Him. Because of this choice, we get a kind of false parallel to everything, be it religion, marriage, politics, you name it... but of course the parallels... the world's dopplegangers for life according to God and truth... will never work. They must automatically fail, because they are, by nature, something broken, just as a marriage without God is something broken. You can't make it work. Even if it waits till eternity, it will fall apart, it will be poison. What good is it for a couple with the best of intentions to stubbornly stick it out in a live-in situation, for example, if in eternity it sends them to hell? They WILL "loose" by such a choice, whether here, hereafter or both.
But not just marriage, but everything has a poisonous parallel (if not many of them). Some even keep up the appearances for a long while before coming unwound, like politics without the reign of Christ (God's law)... but eventually, all of the replacements for truth, for virtue, for religion, for God, etc... will fail and do those who use them harm.
What's sad is that Catholics are now creating "Catholic" parallels... "Catholic" marriage based on feelings and self gratification, "Catholic" politics based on liberal ideas, "Catholic" life lived in a totally non-Catholic way... Shacking up at least doesn't often pretend to be noble. Here Catholics perhaps take things a step lower... hypocrisy. The fake Catholic life consists of hypocrisy. The "choice B" of Catholics who don't want to follow God and the truth, is often hypocrisy. And I think that's even worse than the worldly dopplegangers for all these things themselves.
How many times is it in the Bible? "Woe to you... hypocrites..." Spoken then to the Pharisees, the very word which would later become synonymous with "hypocrite".
The world has idiotic ideas because, in many cases, it has not these days met with anything like truth or real virtue. But the Catholics ought to know better. It's kind of like a kid with a cheat sheet flunking his math test.