Keep the flag flying
Definition 1 of 2
Pro Tip 1/3Persistence Symbol
It expresses determination to continue, against odds or hardships. 
The team's efforts to keep the flag flying inspired the whole town during the crisis.
Pro Tip 2/3Success Continuation
Used when someone persists in actions to maintain success. 
After the award, she worked harder to keep the flag flying.
Pro Tip 3/3Not Literal
The phrase doesn't involve an actual flag but symbolizes an ongoing effort. 
His recovery from injury showed he would keep the flag flying.