So that's the first noble truth, is understanding dukkha. And then the second one is understanding where that originates from. That's samudriya. And what that means is that you understand that suffering comes from you wanting stuff. That nothing is permanent. Everything is non-permanent. So as soon as you're like, I really want that gum, oh I need that gum, and you get the gum, then the gum's gone and you want something else.