In the ancient rhythm of rivalry, Celtic and Rangers meet again on Sunday in Glasgow, carrying the weight of a week that has tested one side's identity and emboldened the other's ambition. A 3-0 League Cup defeat and a European stumble have left Celtic bruised but not broken, still holding a five-point league advantage that gives this redemption match its peculiar tension. Former captain Scott Brown speaks with the authority of someone who has lived inside these moments: what happens in the next ninety minutes will not merely settle a score, but reveal what kind of team Celtic truly are this s