Notice the specific phrase — “stronger than they.” God doesn't promise to help Israel finally match their opponent's strength; He promises to redeem them from someone who remains, factually, stronger. The rescue doesn't require winning a fair fight — it requires an outside power intervening in an unfair one. That matters if you've been measuring your chances by your own strength relative to what's against you. And the result isn't relief described quietly — it's dancing, young and old. Mourning doesn't just lift; it's turned into gladness, an active reversal, not a fade. The text assumes real mourning happened first — it doesn't skip past that to get to the celebration faster.