Once again, the Federal Reserve finds itself at the intersection of patience and necessity, where the quiet arithmetic of consumer prices forces the hand of those who govern the cost of money. Fresh inflation data, arriving hotter than economists anticipated, has all but settled the question of whether the Fed will raise interest rates at its September meeting — the debate has shifted from if to how much. In the long arc of monetary stewardship, this moment reflects a familiar tension: the difficulty of cooling an economy without extinguishing it.