Imam Al-Sajjad (a.s.) said:
مَنْ عَمِلَ بِمَا افْتَرَضَ اللّهِ عَلَيْهِ فَهُوَ مِنْ أَعْبَدِ النّاسِ
Whoever fulfill ls his obligations, will be among the most devout worshippers.1
Worship is neither restricted to serving the people, nor to praying and fasting. Rather, the greatest worship is that one should fulfill his obligatory duties in all areas of life. Which worship is higher and more manifest than the one which could change a society into a flower garden where goodness and prosperity abound. fulfillment of obligations has a wide scope that includes obligations related to worship as well as to society, humanity, economic and other necessities of life. Those who are neglectful of their necessary obligations and yet consider themselves as highly devoted to Islam are under a serious delusion.