The lion lying down with the lamb is the idea that is either projected back in time, saying that there was a time, or maybe that there will be a time… - Jordan Peterson

If you don’t believe in brick walls, you will still be injured when you run headlong into one.

But you will learn something from that, and use what you learn in the future — and the alternative to that single sharp pain is the dull ache of continued hopelessness and vague failure and the sense that time, precious time, is slipping by.

The kids are starting to burn this place and to trash it. They're dragging a grand piano down the stairs. It's the destruction of high culture, about which they're nothing but cynical, because they don't believe that hard work and sacrifice can produce something of any value. They want to bring it down and destroy it.
You can see it in the story of Cain and Abel. Abel is hard working and everyone likes him, and he makes the proper sacrifices, so his life goes really well. And that's part of the reason that Cain hates him. He's jealous and resentful, but worse than that—if you're not doing very well and you're around someone who is doing very well it's painful, because the mere fact of their Being judges you.
And so it's very easy to want to destroy that ideal so that you don't have to live with the terrible consequences of seeing it embodied in front of you. And so part of the reason that people want to tear things down is so that they don't have anything to contrast themselves against and to feel bad. And that's exactly what's happening here. Kids are destroying all of this culture, because the fact that it exists judges them.