Therefore, one who is pleased with a matter has entered into it; and one who is displeased with it has left it." [^6] Imam ‘Ali (as) has also stated: "الرَّاضِي بِفِعلِ قَومٍ كَالدّاخِلِ مَعَهُم فِيهِ وَعلى كُلِّ دَاخِلٍ في بَاطِلٍ إِثمَانِ: إِثمُ العَمَلِ بِهِ وَاِثْمُ الرِّضَا بِهِ" "One who is satisfied with the actions of a people is like one who has participated with them in it.
Every one who participates in wrong-doing has two sins: the sin of committing it and the sin of being pleased with it." [^7] Imam ‘Ali (as) said: "العَامِلُ بِالظُّلمِ وَالرَّاضِي بِهِ وَالمُعِينُ عَلَيهِ شُرَكَاءُ ثَلاثَةٌ" "The one who does injustice, the one who is content with the injustice, and the one who helps carry out the injustice are three partners in the act." [^8] Imam Baqir (as), concerning the principle of enjoining the good and forbidding the evil, in a tradition, has said, "فَانْكِِرُوا بِقُلُوبِكُم وَالفَظُوا بِالسِنَتِكُم وَصُكُّوا بِهَا جِبَاهَهُم وَلا تَخَافُوا في الله لَومَةَ لائِمٍ" "Then deny it with your hearts, and reject it with your tongues and slap it on their foreheads and do not fear, in the way of God, the reproach of any reproacher." [^9] Ibn Jarir narrates in his history book from Abd al-Rahman b.
Abi Layla, that when Imam ‘Ali (as) was facing Mu'awiya's army he said: "ايُّها المُؤمِنُونَ اِنَّه مَن رَأى عُدوَاناً يُعمَلُ بِهِ وَمُنكَراً يُدعَى اِلَيهِ فَانْكَرهُ بِقَلبِهِ فَقَد سَلِِمَ وَبَرِئ وَمَن اَنْكَرَهُ بِلِسَانِهِ فَقَد اُجِِرَ وَهُو اَفضَلُ مِن صَاحِبِه، وَمَن اَنْكَرَهُ بِالسَّيفِ لِتَكُونَ كَلِمَةُ الله العُليا وَكَلِمَةُ الظَّالِمِينَ السُّفلَى فَذَلِكَ الَّذِي اَصَابَ سَبِيلَ الهُدَى وَقَامَ على الطَّرِيقِ وَنوَّرَ في قَلبَهُ اليَقِينُ" "O believers!
Whoever sees an act of aggression taking place or an evil act being called to, and rejects it with his heart, he is secure and free of responsibility. Whoever rejects it with his tongue will be rewarded, and he is better than his companion.
Whoever rejects it with his sword so that the word of God may be uppermost and the word of the wrongdoers lowermost, such a one has attained the path of guidance and become established on the (right) way and certainty has illuminated his heart.”" [^10] Of course, the degrees of the principle of enjoining the good and forbidding the evil are determined by the capacity of the individual. A person, if capable, should use his hand, tongue, and heart to implement the principle.
If he is not capable, he may use his tongue and heart.