Imam Hasan Al-’Askari (a.s.) said:
أَشَدُّ النّاسِ اِجْتِهاداً مَنْ تَرَكَ الذُّنُوبَ
The strongest warrior for the faith among people is one who gives up the sins.1
We know that struggle against one’s rebellious and sensual desires that lead to sins is called the ‘greater jihad’ in Islam, being more important and valuable than struggle with enemies. This warfare is the means of purification of the soul and requires a strong will to achieve victory .
In societies stained with sin, the value of this warfare is more obvious and its importance in achievement of social objectives cannot be denied.
Victories of the Prophet (peace be upon him and his progeny) in Medina were actually the direct result of purification of souls and spiritual struggles of his companions.