Very well explained. Just to add that JIHAD is one of the foremost and effective method of tazkiyah and eeman الَّذِينَ قَالَ لَهُمُ النَّاسُ إِنَّ النَّاسَ قَدْ جَمَعُواْ لَكُمْ فَاخْشَوْهُمْ فَزَادَهُمْ إِيمَاناً وَقَالُواْ حَسْبُنَا اللّهُ وَنِعْمَ الْوَكِيلُ Allatheena qala lahumu alnnasu inna alnnasa qad jamaAAoo lakum faikhshawhum fazadahum eemanan waqaloo hasbuna Allahu waniAAma alwakeelu 3:173 Men said to them: "A great army is gathering against you": And frightened them: But it (only) increased their Faith: They said: "For us Allah sufficeth, and He is the best disposer of affairs." and وَلَمَّا رَأَى الْمُؤْمِنُونَ الْأَحْزَابَ قَالُوا هَذَا مَا وَعَدَنَا اللَّهُ وَرَسُولُهُ وَصَدَقَ اللَّهُ وَرَسُولُهُ وَمَا زَادَهُمْ إِلَّا إِيمَانًا وَتَسْلِيمًا Walamma raa almuminoona alahzaba qaloo hatha ma waAAadana Allahu warasooluhu wasadaqa Allahu warasooluhu wama zadahum illa eemanan watasleeman 33:22 When the Believers saw the Confederate forces, they said: "This is what Allah and his Messenger had promised us, and Allah and His Messenger told us what was true." And it only added to their faith and their zeal in obedience هُوَ الَّذِي أَنزَلَ السَّكِينَةَ فِي قُلُوبِ الْمُؤْمِنِينَ لِيَزْدَادُوا إِيمَانًا مَّعَ إِيمَانِهِمْ وَلِلَّهِ جُنُودُ السَّمَاوَاتِ وَالْأَرْضِ وَكَانَ اللَّهُ عَلِيمًا حَكِيمًا Huwa allathee anzala alssakeenata fee quloobi almumineena liyazdadoo eemanan maAAa eemanihim walillahi junoodu alssamawati waalardi wakana Allahu AAaleeman hakeeman 48:4 It is He Who sent down tranquillity into the hearts of the Believers, that they may add faith to their faith;- for to Allah belong the Forces of the heavens and the earth; and Allah is Full of Knowledge and Wisdom;- Please correct me if i am wrong.