When I say Arthur has a deal with the devil, you all don't believe me but it's true.
Apart from Robbins/Bernstein/Sondheim, he does things that are merely mediocre but then somehow has tremendous success with them, to the consternation of all the shaking heads around him, who say "How does he do it?"
His answer is a cliche turned into a line turned into a Sondheim lyric: "You either got it--or you don't, and, boys, I've got it!"
Everyone thinks the "it" in question is Talent. But it's not. That's not the "it" that Arthur's got.
Arthur's got the Luck that only the Truly, Deeply Evil fall into.