O you who believe! Intoxicants and gambling... are an abomination, of Satan’s handiwork. Avoid such (abomination), so that you may prosper. Satan’s plan is only to excite enmity and hatred between you, with intoxicants and gambling, and hinder you from the rememberance of God and from prayer. Will you not then abstain? (5:90-91).
﴿يَاأَيُّهَا الَّذِينَ آمَنُوا إِنَّمَا الْخَمْرُ وَالْمَيْسِرُ وَالأَنصَابُ وَالأَزْلاَمُ رِجْسٌ مِنْ عَمَلِ الشَّيْطَانِ فَاجْتَنِبُوهُ لَعَلَّكُمْ تُفْلِحُونَ إِنَّمَا يُرِيدُ الشَّيْطَانُ أَنْ يُوقِعَ بَيْنَكُمْ الْعَدَاوَةَ وَالْبَغْضَاءَ فِي الْخَمْرِ وَالْمَيْسِرِ وَيَصُدَّكُمْ عَنْ ذِكْرِ اللَّهِ وَعَنْ الصَّلاَةِ فَهَلْ أَنْتُمْ مُنتَهُونَ﴾
But seek, with that which God has bestowed on you, the Home of the Hereafter. Nor forget your portion in this world. But you do good, as God has been good to you, and seek not mischief in the land; for God Loves not the mischief makers (28:77).
﴿وَابْتَغِ فِيمَا آتَاكَ اللَّهُ الدَّارَ الآخِرَةَ وَلاَ تَنسَ نَصِيبَكَ مِنْ الدُّنْيَا وَأَحْسِنْ كَمَا أَحْسَنَ اللَّهُ إِلَيْكَ وَلاَ تَبْغِ الْفَسَادَ فِي الأَرْضِ إِنَّ اللَّهَ لاَ يُحِبُّ الْمُفْسِدِينَ﴾
These selections can be supported by many others from the Qur’an and the Traditions of Muhammad. In themselves they are sufficient to portray the fundamental morals of Islam. These Islamic morals are unique in their nature under all circumstances. They are introduced by God not simply to be admired occasionally but to be enforced and effective. They are meant to help the individual to develop his personality and cultivate his character in the most wholesome manner, to strengthen his bonds and consolidate his association with God, the Source of all Goodness.
Never were the Islamic morals designed to intimidate the individual and make him passive or indifferent. One example will illustrate the point. If a Muslim is wronged or oppressed, he has the free choice either to resist and retaliate in an equal measure or to forgive and entrust God with the results of his deed. He knows that he is authorized to take either action, and he equally knows that it is better for him to forgive. So when he forgives, he does so with his own free choice for the love of God. Similarly, when he retaliates he is not violating the Law or acting unjustly; he is defending his rights, an attitude which is a sacred duty in itself, and is helping the rightful authorities to establish order and justice. If Islam were to demand absolute forgiveness as some other creeds do in theory, many undisciplined people would be tempted to do wrong and exceed all limits.