You are remembered for the rules you break.
MacArthur isn't celebrating rule-breaking for its own sake, but rather observing that history's memory is selective and gravitates toward the unconventional. The obvious reading suggests rule-breakers are rebels; the deeper one is that conformity, however virtuous, leaves no mark precisely because it's indistinguishable from everyone else's conformity. Consider how we remember the surgeons who operated without waiting for perfect conditions during wartime, or the teachers who taught forbidden subjects—not because rule-breaking was their goal, but because the rules themselves stood between them and what mattered. The insight cuts both ways: it warns that being forgotten might be the price of obedience, while also suggesting that the rules worth breaking are rarely the petty ones.