Yes. If you were stung by a wasp does it make you happy when you smack it to death and it never stings you again? Or do you forgive it as it continues to sting you and you gladly turn the other cheek to let it sting your other cheek too? Then when your facial cheeks are all stung, do you let it sting both your lower cheeks so when you sit down you can forgive them? Now the whole village is being stung by wasps and you taught everyone that revenge is not the right way and instead the village worships the wasps and builds more nests for them due to the ability to forgive. Do you honestly think revenge is useless?