When you're a teenager your parents stress to you how it's important to have clear values now so that when you're put into difficult situations as an adult, you won't accidentally crack under pressure.
As a teenager you think of all sort of exciting things like drugs and sex, but once you're past your early twenties those are pretty much moot points, but your values are still constantly being tested, just on much more mundane issues.
Should you buy your dream house that will put you into a precarious financial situation, or can you stomach the fixer-upper that will allow you to eat more than just ramen for the foreseeable future?
Or on an even smaller scale, you've had a rough week. Nothing seems to be going right and the last thing you have time for is fixing lunch, so you're tempted to treat yourself at your favorite restaurant by your work, but things are really tight fiscally and you know that going out for lunch will likely mean that you have to be late with yet another bill.
You swore that you would never be one of those parents who ignores their kids for their phones, but after a long day, you're tired, and Facebook is so much easier than the thousandth request to sing "Itsy Bitsy Spider".
It's important to you and your spouse that you have a weeknight when you're both home, but you've also really been dying for something just for you and a yoga class just opened up on your one night home together.
These are the values that get tested every day as an adult. This is the stuff you want your teenage self to understand is important.