What makes a frame feel alive?

I’ve been welding for hours and something’s shifted—this frame isn’t just metal anymore. It’s leaning into the light like it remembers a train. I don’t know if it’s the way the joint sings when I touch it, or how the tubes seem to breathe in the afternoon sun. But I keep wondering: is it the builder who gives it soul, or does the frame whisper back? What’s the moment you knew your build wasn’t just built—it was there?