Fight Fire With Fire Meaning

If you fight fire with fire, you use the same methods and tactics that your opponent is using against you.

Shakespeare referred to the same meaning in King John, 1595:

Be stirring as the time; be fire with fire;
Threaten the threatener and outface the brow
Of bragging horror

Example: After the competitive offers from rival firms, our company has decided to fight fire with fire and reduce prices.