Badges mark quoted or attributed material (Qur'an, hadith, another author, an opposing view). Unbadged passages are Maulana Wahiduddin Khan's own words.
According to Quranic teachings, revenge is not an option. Revenge only increases the problem. The chapter Al-Nahl (Bees) of the Quran gives practical advice on this point. The translation of the relevant verses is as follows: p. 244
If you want to retaliate, retaliate to the same degree as the injury done to you. But if you are patient, it is better to be so. (16:126) p. 244Qur'an
What is revenge? Revenge is the action of inflicting hurt or harm on someone for an injury or wrong suffered at their hands. According to Quranic teachings, there are two levels of revenge—one may be called equal revenge and the second may be called forgetting the bad experience received from others. p. 244original + quote
Although revenge or retaliation is allowed, but with a strict condition—that it should be an equal revenge, not exceeding the others’ bad action. But when seriously thought about, one realizes that this is not an option. It is so difficult that no sincere person can take this option. Because, there is no available measurement that may tell you that your retaliation was completely equal to the action you received from the other. p. 244
This option is, therefore, only a hypothetical option. Any sincere person will decide not to take this option, because if during the retaliation you exceed the limit you will be punished by God Almighty, and you cannot bear to do so. p. 244
So, practically there is only one option and that is forgiveness. While revenge may open a new chapter that is revenge after revenge, but forgiveness puts an end to this chain. Forgiveness means that you have put a full stop, while revenge in this case means that you have put commas. p. 245
Forgiveness in such cases is a rewardable action. Forgiveness is a highly valuable deed. You will find its reward in the world hereafter, and that is far better for a believer. p. 245
Moreover, forgiveness gives you its benefits in the present world also. When you forgive a person you hit his conscience. Forgiveness is a kind of corrective measure. Forgiveness creates a sense of repentance in the other person and he tries to correct himself. In this sense, forgiveness has a value in terms of social reform. p. 245
Practically there is only one option and that is forgiveness. While revenge may open a new chapter that is revenge after revenge, but forgiveness puts an end to this chain. p. 244