Luka has to stifle a laugh at the situation and how wildly far apart their worlds are.

"No no no no, I don't think this analogy is really working. I don't think building houses is really your joie de vivre. There has to be something you're really passionate about! Something that makes your heart fell like it could jump from your chest!"

Luka gives Gyre an anticipatory look. Most people who lived long enough had something they felt passionate about, even if they had yet to realize it.