Although taking revenge is allowed within the same extent of earlier suffereing, the act of having patience, forgiving and making reconciliation is better!

Verses 40-43 of Chapter 42:

The recompense for an evil is an evil like thereof; but whoever forgives and makes reconciliation, his reward is with Allah. Verily, He likes not the wrongdoers. And indeed whosoever takes revenge after he has suffered wrong, for such there is no way (of blame) against them. The way is only against those who oppress men and rebel in the earth without justification; for such there will be a painful torment. And verily, whosoever shows patience and forgives, that would truly be from the things recommended by Allah.