From the album Apollo XXI
Lacy wants to comfort his younger self but spends the entire song arguing against it. The verse is a love letter to not knowing, building a case that uncertainty, fear, and hesitation are what make life livable. The chorus fantasy would destroy everything the verse celebrates.
What you don't know is the fun part of passion / And its the place where I think all the fun begins
He's not saying 'ignorance is bliss.' He's saying the fun part is the not knowing itself. Passion lives in the gap between what you see coming and what actually happens. If you already knew 'you'll be fine,' there's no passion left.
What you don't see is what you believe / But to be is the place where the angels dance
Belief only works when you can't see the proof yet. The angels show up in the act of existing without certainty, not after you've been reassured. This is Lacy's blindspot. He wants to give his past self proof, which would kill belief.
What you don't touch is what you won't clutch / But you'll latch on tight when the coast is clear
He knows he only commits once the danger has passed. That's not a flex. That's him admitting he waits until it's safe to care about anything. The time travel wish is the same move. He wants to skip the scary part.
If I could travel through time, I think I / Would tell myself from the past, 'You'll be fine'
Notice he never says what 'fine' means. No details, no proof, just the phrase itself. It's not actually comfort. It's a shortcut he knows wouldn't work but still wishes he had.
The song is smarter than the narrator. Lacy thinks he's offering comfort to his past self, but the verse dismantles the entire premise. If his younger self heard 'you'll be fine,' the fun would be over. The wish is just another version of waiting for the coast to clear.