The ability to concentrate and to use time well is everything.
Lee Iacocca understood something most productivity advice misses: concentration and time management aren't separate skills but rather two faces of the same coin. A scattered mind wastes hours even when the clock shows productivity, while genuine focus compresses work into decisive minutes—which is precisely why a surgeon's four-hour operation requires more *actual* labor than a distracted person's eight-hour workday. The weight of his word "everything" cuts deeper than it first appears; he's suggesting that talent, connections, and resources matter far less than your ability to actually show up mentally. This explains why some unremarkable people accomplish extraordinary things while brilliant ones fritter away their gifts.