Being in the Zone
This does work - ask any professional sportsperson about being "in the zone". They don't know how they got the mental/physical strength/insight/sheer willingness-to-try, in that moment, but it came from somewhere and they watched themselves do it as if they were up there in the stands with the rest of us mortals.
Bob Dylan once said: "I don't write songs, I just write them down." That's being in the zone.