One of the noble qualities that recommended in the Qur'an is forgiveness , In the Al Qur'an verse (7:199) mentioned, with the mean :
“Show forgiveness, enjoin what is good, and turn away from the foolish (i.e. don't punish them) “
and also Al-Qur'an verse ( 24 : 22 ) , with the mean :
“........................ Let them pardon and forgive. Do you not love that Allâh should forgive you? And Allâh is Oft-Forgiving, Most Merciful”
Those who do not follow the noble teachings of the Qur'an will find it hard to forgive others. Because they are easily upset about anything wrong done. In fact, God has advocated to the believers that forgiveness is better: as had mentioned in Al-Qur'an verse ( 64:14) with the means :
“O you who believe! Verily, among your wives and your children are your enemies (who may stop you from the obedience of Allâh), therefore beware of them! But if you pardon (them) and overlook, and forgive (their faults), then verily, Allâh is Oft-Forgiving, Most Merciful”
Also revealed in the Qur'an verse (42:43) that forgiveness is a noble trait and admirable :
“And verily, whosoever shows patience and forgives that would truly be from the things recommended by Allâh “
Based on this, the believers are those who are forgiving, loving and charitable, as stated in the Qur'an ( 3: 134 ) with the mean :
“Those who spend (freely) whether in prosperity or in adversity; who restrain anger and pardon (all) men; for Allah loves those who do good,― “
Understanding of the believers of forgiveness is very different from those who are not living according to the teachings of the Quran. Although many people may say they have to forgive someone who hurt them, but it took a long time to free ourselves from the hate and anger in their hearts. Their attitude tends to show that anger. On the other hand, forgiveness of believers is sincere. Because they know that humans are tested in this world, and learn from their mistakes, they are charitable and benevolent. More than that, the believers are also able to forgive even though they are right and others wrong. When forgiving, they do not differentiate between large and small mistakes. Someone may be very hurt them unintentionally. However, believers know that everything happens according to God's will, and walk according to a particular destiny, and therefore, they surrender themselves with this event, was never bound by anger.
According to recent research, the scientists prove that they whom able to forgive is healthier both soul and body. The people who researched stated that they are suffering less after forgiving people who hurt them. The study showed, that people who learn to forgive feel better, not only soul but also body. For example, that have proved based on research, the symptoms of mental illness and the body, like the back stress [emphasis soul], difficulty sleeping and stomach pain is reduced in these people.
All the research suggests that anger is a conditioned of mind that is very damaging to human health. Forgiveness, on the other hand, though heavy, was happy, one part of commendable character, which eliminates any destructive effects of anger, and helping the person to enjoy a healthy life, both physically and emotionally. However, the real goal of forgiveness, just as everything else - must be to get the pleasure of Allah. The fact that moral properties like this, and that the benefits have been scientifically proven, have been revealed in many verses of the Qur'an, and this is just one of many sources of wisdom that revealed in Al-Qur'an.